The waste of water<\/span> <\/span><\/h1><\/div><\/div><\/div><\/div><\/div>The water that is gone<\/a>Water Footprint<\/a>The world is thirsty because it is hungry<\/a><\/div><\/div><\/div><\/div>Water Wastes and Waste’s Water\u2026<\/h2><\/div>A word\u2019s game to highlight the two reasons why we face the theme of water.<\/p>\n
\n- The first one is that wasting food means wasting the water used to produce it and knowing the amount of \u201cinvisible\u201d water contained in the food we throw away could prevent us from wasting it.
\nFor instance, if people knew that we need 15,000 liters of water to produce one kilogram of beef, they would put an effort into not throwing the leftover meat and they could reuse it to cook meatballs, meatloaf or any other recipe they may invent.<\/li>\n - The second reason is that it doesn\u2019t make sense to worry about closing the tap water when we brush our teeth (saving a few liters of water) and then be indifferent to the enormous water consumption caused by our food choices (thousands of liters a day).<\/li>\n<\/ul>\n
Going back to the previous example, knowing the surprising data of the “virtual” water contained in a pound of meat could lead some people to eat less meat and others to avoid it completely.<\/p>\n
Making the way we relate to food sustainable doesn\u2019t mean only battling waste, but also choosing a diet that involves a withdrawal of water resources compatible with their specific availability.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
![](\"https:\/\/unabuonaoccasione.it\/wp-content\/uploads\/2026\/04\/riflesso-acqua.jpg\" "\\"water")
<\/span><\/div><\/div><\/div><\/div><\/div><\/div>The water that is gone<\/h2><\/div>The most recent annual reports of the World Economic Forum<\/a> show that, in the rank of global risks, the water crisis always ranks high in terms of probability of occurrence and severity of its possible effects<\/p>\nThis prediction was recently confirmed by two of the world’s leading experts of hydrological systems (Mekonnen and Hoekstra) in a study<\/a> that shows that water scarcity is a problem widely underestimated. In fact, today there are about 4 billion people already suffering from lack of water for at least one month a year, while 1.8 billion have to deal with drought for at least six months a year.<\/p>\nThe question we must answer is why does water start to run low in larger and larger areas of the world, despite the water cycle on the planet should ensure a balanced water budget between water output and input?<\/p>\n<\/div><\/div><\/div>
![\"11](\"https:\/\/unabuonaoccasione.it\/wp-content\/uploads\/2016\/06\/11-foto-acqua-tra-terra-mare-e-cielo-ecco-il-ciclo-dellacqua.jpg\" "\\"11")
<\/span><\/div>Image from \u201cStorie di acqua\u201d \u2013 \u00a9 Sanpellegrino 2016<\/p>\n<\/div><\/div><\/div><\/div><\/div>
There are two answers
\n1. Water demand is growing<\/strong>
\nThe demographic and economic growth leads to an excessive consumption of water and that prevents the charging of water reserves (level of groundwater, river flow, etc.).<\/em><\/p>\nAmong the causes of this growth of water demand in the world, a crucial role is played by the demographic dynamic. The estimates indicate that the global population will increase to more than 8.5 billion people by 2030, reaching nearly 10 billion by 2050.
\nThis will require an increase of at least 20% in water consumption in order to face an increased demand for food (which may touch the +50% by 2030 and +70% by 2050)<\/p>\n
Another cause is the economic development. The improvement of social and life conditions of the population in developing countries goes along with changes in eating habits and, with higher amounts of calories consumed (just think that in the last twenty years, meat consumption has more than doubled in China and by 2030 it will double again). This determines an increase of water resources extracted, because the production of meat, milk, sugar and vegetable oils requires a larger amount of water than the production of cereals.<\/p>\n
Considering that today many areas characterized by a sampling rate of water resource exceeding 20% are considered at risk, the predicted scenario for the years to come, without a corrective action, appears dramatic.
\nFurthermore, the economic development also implies an increasing pressure on available water resources relatively to the increasing global demand for energy which is related to.
\nReferring to hydroelectric power and to the energy produced from biomasses, we expect a 60% and a 30% increase, respectively, on the current values by 2030.<\/p>\n<\/div><\/div><\/div>
![\"1995\"](\"https:\/\/unabuonaoccasione.it\/wp-content\/uploads\/2016\/06\/1995.png\" "\\"1995\\"")
<\/span><\/div>Image from \u201cEating Planet\u201d di Barilla CFN<\/p>\n<\/div>
Furthermore, the economic development also implies an increasing pressure on available water resources relatively to the increasing global demand for energy which is related to.
\nReferring to hydroelectric power and to the energy produced from biomasses, we expect a 60% and a 30% increase, respectively, on the current values by 2030.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
2. Decreasing water availability<\/strong>
\nPollution and climate change combine to limit the possibility of water use.<\/em>
\nThe main cause of the reduction of water availability is the pollution, that threatens the quality of water resources.<\/p>\nSome data explain the size of the phenomenon: it is estimated that, every day, two million tons of waste generated by human activity are discharged into waterways. The contribution of food production of pollutants to the water reaches 40% in developed countries, and even 54% in those developing. In the latter is the fact that 70% of industrial waste is discharged into waterways without undergoing any purification treatment, thus contributing to the pollution of the available fresh water resources.<\/p>\n
Another factor that begins to have a significant impact on the availability of water resources is climate change.<\/p>\n
There is now a broad consensus about its effects on the water and its availability: projections show an overall reduction of rainfall in the semi-arid areas, an increase in temperate zones, greater variability in rainfall distribution, greater frequency of extreme events and a general increase of temperature.<\/p>\n
n particular, it provides a strong reduction of surface runoff of the rivers and the refeeding of aquifers throughout the Mediterranean basin. We must add to this the salinization of coastal aquifers due to rising sea levels and lower soil absorption capacity caused by increasingly frequent rains characterized by strong intensity.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
But how much water we have in Italy?<\/strong><\/p>\nItaly is a country rich in water (especially in the North) but it is also a country that consumes vast amounts of water (significantly above the EU average) in terms of overall water footprint and individual consumption.<\/p>\n
Severe water stress phenomena have occurred, most recently, in the Po basin, the most serious of which (2003) caused power outages due to the impossibility of the most important Italian powerhouse (the one in Porto Tolle, province of Rovigo) to draw from river Po the water required for the cooling of equipment.<\/p>\n
The prospects are not encouraging since global warming will cause unfavorable climatic trends (increases in temperature and decrease in rainfall, according to CMCC <\/a>\u2013 Euro-Mediterranean Center on Climate Change), while plausible dynamics birth\/mortality and migration will result, according to ISTAT, an increase in population and thus an increase in water demand.<\/p>\nAll these and other factors meant that WRI <\/a>(World Resources Institute in Washington) places Italy among the countries exposed in the medium term (2040) to the risk of severe(high) water stress.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div>Water Footprint<\/h2><\/div>\u201cThe water footprint of a product is the volume of freshwater used to produce it, measured along the different steps of its supply chain.\u201d<\/em><\/p>\nThe concept of water footprint is an indicator referring to water use in consumer goods. The concept is similar to the ecological footprint and carbon footprint but, instead of soil consumption and use of fossil energy, it refers to water.<\/p>\n
Contrary to our common sense, however, the water is not all the same. There are three types of water involved in the production of agri-food goods (and not) and entering the water footprint calculation.<\/p>\n<\/div><\/div><\/div>
The colors of water<\/strong><\/p>\nThe blue water <\/strong>is the water of the lakes, rivers and underground aquifers. It can be derived from renewable sources that are recharged by rainfall and snowmelt or groundwater can be extracted from non-renewable fossil aquifers. It is easy to access and transport and can be measured, contained in dams, stored, pumped in water networks to meet the needs of different sectors (agricultural, industrial and domestic). Globally, 70% of this water is used for irrigation (FAO \u2013 AQUASTAT), but in some countries, even very dry (as Middle East or North Africa), this water use can exceed 90% of total consumption.<\/p>\nThe green water<\/strong> is rain or snowy water that does not become blue water, as it evaporates or it is transpired by the plants. It is almost exclusively used in agriculture and it meets the requirement for an 84% stake.<\/p>\nThe grey water<\/strong> is \u201cpolluted\u201d water, used to dilute contaminants in the production process and it is not reusable. So, it is not a source of water for human use.<\/p>\n<\/div><\/div><\/div><\/div><\/div>The water footprint of a product is a geographically sensitive and explicit concept, it let us measure the consumption of water needed to produce a good in different geographical areas. For a same food product, in fact, the water footprint varies greatly from place to place, depending on factors such as climate, agricultural techniques adopted, the yield of crops, the abundant availability of rainwater or the need to use water irrigation, ecc.<\/p>\n
The sustainability of the water samples required to produce a food is very different depending on where and how this food is produced, because the amount of water needed to produce may not be the only variable, but also the \u201cquality\u201d of \u2018 water used (if blue or green) and the possibility that it is subtracted (in a situation of poor overall availability) to main uses (in particular for domestic use).<\/p>\n
The example of an orange<\/strong> (litres per orange 200 grams)<\/em><\/p>\n
Water Wastes and Waste’s Water\u2026<\/h2><\/div>A word\u2019s game to highlight the two reasons why we face the theme of water.<\/p>\n
\n- The first one is that wasting food means wasting the water used to produce it and knowing the amount of \u201cinvisible\u201d water contained in the food we throw away could prevent us from wasting it.
\nFor instance, if people knew that we need 15,000 liters of water to produce one kilogram of beef, they would put an effort into not throwing the leftover meat and they could reuse it to cook meatballs, meatloaf or any other recipe they may invent.<\/li>\n - The second reason is that it doesn\u2019t make sense to worry about closing the tap water when we brush our teeth (saving a few liters of water) and then be indifferent to the enormous water consumption caused by our food choices (thousands of liters a day).<\/li>\n<\/ul>\n
Going back to the previous example, knowing the surprising data of the “virtual” water contained in a pound of meat could lead some people to eat less meat and others to avoid it completely.<\/p>\n
Making the way we relate to food sustainable doesn\u2019t mean only battling waste, but also choosing a diet that involves a withdrawal of water resources compatible with their specific availability.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
<\/span><\/div><\/div><\/div><\/div><\/div><\/div>The water that is gone<\/h2><\/div>The most recent annual reports of the World Economic Forum<\/a> show that, in the rank of global risks, the water crisis always ranks high in terms of probability of occurrence and severity of its possible effects<\/p>\nThis prediction was recently confirmed by two of the world’s leading experts of hydrological systems (Mekonnen and Hoekstra) in a study<\/a> that shows that water scarcity is a problem widely underestimated. In fact, today there are about 4 billion people already suffering from lack of water for at least one month a year, while 1.8 billion have to deal with drought for at least six months a year.<\/p>\nThe question we must answer is why does water start to run low in larger and larger areas of the world, despite the water cycle on the planet should ensure a balanced water budget between water output and input?<\/p>\n<\/div><\/div><\/div>
<\/span><\/div>Image from \u201cStorie di acqua\u201d \u2013 \u00a9 Sanpellegrino 2016<\/p>\n<\/div><\/div><\/div><\/div><\/div>
There are two answers
\n1. Water demand is growing<\/strong>
\nThe demographic and economic growth leads to an excessive consumption of water and that prevents the charging of water reserves (level of groundwater, river flow, etc.).<\/em><\/p>\nAmong the causes of this growth of water demand in the world, a crucial role is played by the demographic dynamic. The estimates indicate that the global population will increase to more than 8.5 billion people by 2030, reaching nearly 10 billion by 2050.
\nThis will require an increase of at least 20% in water consumption in order to face an increased demand for food (which may touch the +50% by 2030 and +70% by 2050)<\/p>\n
Another cause is the economic development. The improvement of social and life conditions of the population in developing countries goes along with changes in eating habits and, with higher amounts of calories consumed (just think that in the last twenty years, meat consumption has more than doubled in China and by 2030 it will double again). This determines an increase of water resources extracted, because the production of meat, milk, sugar and vegetable oils requires a larger amount of water than the production of cereals.<\/p>\n
Considering that today many areas characterized by a sampling rate of water resource exceeding 20% are considered at risk, the predicted scenario for the years to come, without a corrective action, appears dramatic.
\nFurthermore, the economic development also implies an increasing pressure on available water resources relatively to the increasing global demand for energy which is related to.
\nReferring to hydroelectric power and to the energy produced from biomasses, we expect a 60% and a 30% increase, respectively, on the current values by 2030.<\/p>\n<\/div><\/div><\/div>
<\/span><\/div>Image from \u201cEating Planet\u201d di Barilla CFN<\/p>\n<\/div>
Furthermore, the economic development also implies an increasing pressure on available water resources relatively to the increasing global demand for energy which is related to.
\nReferring to hydroelectric power and to the energy produced from biomasses, we expect a 60% and a 30% increase, respectively, on the current values by 2030.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
2. Decreasing water availability<\/strong>
\nPollution and climate change combine to limit the possibility of water use.<\/em>
\nThe main cause of the reduction of water availability is the pollution, that threatens the quality of water resources.<\/p>\nSome data explain the size of the phenomenon: it is estimated that, every day, two million tons of waste generated by human activity are discharged into waterways. The contribution of food production of pollutants to the water reaches 40% in developed countries, and even 54% in those developing. In the latter is the fact that 70% of industrial waste is discharged into waterways without undergoing any purification treatment, thus contributing to the pollution of the available fresh water resources.<\/p>\n
Another factor that begins to have a significant impact on the availability of water resources is climate change.<\/p>\n
There is now a broad consensus about its effects on the water and its availability: projections show an overall reduction of rainfall in the semi-arid areas, an increase in temperate zones, greater variability in rainfall distribution, greater frequency of extreme events and a general increase of temperature.<\/p>\n
n particular, it provides a strong reduction of surface runoff of the rivers and the refeeding of aquifers throughout the Mediterranean basin. We must add to this the salinization of coastal aquifers due to rising sea levels and lower soil absorption capacity caused by increasingly frequent rains characterized by strong intensity.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
But how much water we have in Italy?<\/strong><\/p>\nItaly is a country rich in water (especially in the North) but it is also a country that consumes vast amounts of water (significantly above the EU average) in terms of overall water footprint and individual consumption.<\/p>\n
Severe water stress phenomena have occurred, most recently, in the Po basin, the most serious of which (2003) caused power outages due to the impossibility of the most important Italian powerhouse (the one in Porto Tolle, province of Rovigo) to draw from river Po the water required for the cooling of equipment.<\/p>\n
The prospects are not encouraging since global warming will cause unfavorable climatic trends (increases in temperature and decrease in rainfall, according to CMCC <\/a>\u2013 Euro-Mediterranean Center on Climate Change), while plausible dynamics birth\/mortality and migration will result, according to ISTAT, an increase in population and thus an increase in water demand.<\/p>\nAll these and other factors meant that WRI <\/a>(World Resources Institute in Washington) places Italy among the countries exposed in the medium term (2040) to the risk of severe(high) water stress.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div>Water Footprint<\/h2><\/div>\u201cThe water footprint of a product is the volume of freshwater used to produce it, measured along the different steps of its supply chain.\u201d<\/em><\/p>\nThe concept of water footprint is an indicator referring to water use in consumer goods. The concept is similar to the ecological footprint and carbon footprint but, instead of soil consumption and use of fossil energy, it refers to water.<\/p>\n
Contrary to our common sense, however, the water is not all the same. There are three types of water involved in the production of agri-food goods (and not) and entering the water footprint calculation.<\/p>\n<\/div><\/div><\/div>
The colors of water<\/strong><\/p>\nThe blue water <\/strong>is the water of the lakes, rivers and underground aquifers. It can be derived from renewable sources that are recharged by rainfall and snowmelt or groundwater can be extracted from non-renewable fossil aquifers. It is easy to access and transport and can be measured, contained in dams, stored, pumped in water networks to meet the needs of different sectors (agricultural, industrial and domestic). Globally, 70% of this water is used for irrigation (FAO \u2013 AQUASTAT), but in some countries, even very dry (as Middle East or North Africa), this water use can exceed 90% of total consumption.<\/p>\nThe green water<\/strong> is rain or snowy water that does not become blue water, as it evaporates or it is transpired by the plants. It is almost exclusively used in agriculture and it meets the requirement for an 84% stake.<\/p>\nThe grey water<\/strong> is \u201cpolluted\u201d water, used to dilute contaminants in the production process and it is not reusable. So, it is not a source of water for human use.<\/p>\n<\/div><\/div><\/div><\/div><\/div>The water footprint of a product is a geographically sensitive and explicit concept, it let us measure the consumption of water needed to produce a good in different geographical areas. For a same food product, in fact, the water footprint varies greatly from place to place, depending on factors such as climate, agricultural techniques adopted, the yield of crops, the abundant availability of rainwater or the need to use water irrigation, ecc.<\/p>\n
The sustainability of the water samples required to produce a food is very different depending on where and how this food is produced, because the amount of water needed to produce may not be the only variable, but also the \u201cquality\u201d of \u2018 water used (if blue or green) and the possibility that it is subtracted (in a situation of poor overall availability) to main uses (in particular for domestic use).<\/p>\n
The example of an orange<\/strong> (litres per orange 200 grams)<\/em><\/p>\n
A word\u2019s game to highlight the two reasons why we face the theme of water.<\/p>\n
- \n
- The first one is that wasting food means wasting the water used to produce it and knowing the amount of \u201cinvisible\u201d water contained in the food we throw away could prevent us from wasting it.
\nFor instance, if people knew that we need 15,000 liters of water to produce one kilogram of beef, they would put an effort into not throwing the leftover meat and they could reuse it to cook meatballs, meatloaf or any other recipe they may invent.<\/li>\n - The second reason is that it doesn\u2019t make sense to worry about closing the tap water when we brush our teeth (saving a few liters of water) and then be indifferent to the enormous water consumption caused by our food choices (thousands of liters a day).<\/li>\n<\/ul>\n
Going back to the previous example, knowing the surprising data of the “virtual” water contained in a pound of meat could lead some people to eat less meat and others to avoid it completely.<\/p>\n
Making the way we relate to food sustainable doesn\u2019t mean only battling waste, but also choosing a diet that involves a withdrawal of water resources compatible with their specific availability.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
<\/span><\/div><\/div><\/div><\/div><\/div><\/div>The water that is gone<\/h2><\/div>
The most recent annual reports of the World Economic Forum<\/a> show that, in the rank of global risks, the water crisis always ranks high in terms of probability of occurrence and severity of its possible effects<\/p>\n
This prediction was recently confirmed by two of the world’s leading experts of hydrological systems (Mekonnen and Hoekstra) in a study<\/a> that shows that water scarcity is a problem widely underestimated. In fact, today there are about 4 billion people already suffering from lack of water for at least one month a year, while 1.8 billion have to deal with drought for at least six months a year.<\/p>\n
The question we must answer is why does water start to run low in larger and larger areas of the world, despite the water cycle on the planet should ensure a balanced water budget between water output and input?<\/p>\n<\/div><\/div><\/div>
<\/span><\/div>Image from \u201cStorie di acqua\u201d \u2013 \u00a9 Sanpellegrino 2016<\/p>\n<\/div><\/div><\/div><\/div><\/div>
There are two answers
\n1. Water demand is growing<\/strong>
\nThe demographic and economic growth leads to an excessive consumption of water and that prevents the charging of water reserves (level of groundwater, river flow, etc.).<\/em><\/p>\nAmong the causes of this growth of water demand in the world, a crucial role is played by the demographic dynamic. The estimates indicate that the global population will increase to more than 8.5 billion people by 2030, reaching nearly 10 billion by 2050.
\nThis will require an increase of at least 20% in water consumption in order to face an increased demand for food (which may touch the +50% by 2030 and +70% by 2050)<\/p>\nAnother cause is the economic development. The improvement of social and life conditions of the population in developing countries goes along with changes in eating habits and, with higher amounts of calories consumed (just think that in the last twenty years, meat consumption has more than doubled in China and by 2030 it will double again). This determines an increase of water resources extracted, because the production of meat, milk, sugar and vegetable oils requires a larger amount of water than the production of cereals.<\/p>\n
Considering that today many areas characterized by a sampling rate of water resource exceeding 20% are considered at risk, the predicted scenario for the years to come, without a corrective action, appears dramatic.
\nFurthermore, the economic development also implies an increasing pressure on available water resources relatively to the increasing global demand for energy which is related to.
\nReferring to hydroelectric power and to the energy produced from biomasses, we expect a 60% and a 30% increase, respectively, on the current values by 2030.<\/p>\n<\/div><\/div><\/div><\/span><\/div>Image from \u201cEating Planet\u201d di Barilla CFN<\/p>\n<\/div>
Furthermore, the economic development also implies an increasing pressure on available water resources relatively to the increasing global demand for energy which is related to.
\nReferring to hydroelectric power and to the energy produced from biomasses, we expect a 60% and a 30% increase, respectively, on the current values by 2030.<\/p>\n<\/div><\/div><\/div><\/div><\/div>2. Decreasing water availability<\/strong>
\nPollution and climate change combine to limit the possibility of water use.<\/em>
\nThe main cause of the reduction of water availability is the pollution, that threatens the quality of water resources.<\/p>\nSome data explain the size of the phenomenon: it is estimated that, every day, two million tons of waste generated by human activity are discharged into waterways. The contribution of food production of pollutants to the water reaches 40% in developed countries, and even 54% in those developing. In the latter is the fact that 70% of industrial waste is discharged into waterways without undergoing any purification treatment, thus contributing to the pollution of the available fresh water resources.<\/p>\n
Another factor that begins to have a significant impact on the availability of water resources is climate change.<\/p>\n
There is now a broad consensus about its effects on the water and its availability: projections show an overall reduction of rainfall in the semi-arid areas, an increase in temperate zones, greater variability in rainfall distribution, greater frequency of extreme events and a general increase of temperature.<\/p>\n
n particular, it provides a strong reduction of surface runoff of the rivers and the refeeding of aquifers throughout the Mediterranean basin. We must add to this the salinization of coastal aquifers due to rising sea levels and lower soil absorption capacity caused by increasingly frequent rains characterized by strong intensity.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
But how much water we have in Italy?<\/strong><\/p>\n
Italy is a country rich in water (especially in the North) but it is also a country that consumes vast amounts of water (significantly above the EU average) in terms of overall water footprint and individual consumption.<\/p>\n
Severe water stress phenomena have occurred, most recently, in the Po basin, the most serious of which (2003) caused power outages due to the impossibility of the most important Italian powerhouse (the one in Porto Tolle, province of Rovigo) to draw from river Po the water required for the cooling of equipment.<\/p>\n
The prospects are not encouraging since global warming will cause unfavorable climatic trends (increases in temperature and decrease in rainfall, according to CMCC <\/a>\u2013 Euro-Mediterranean Center on Climate Change), while plausible dynamics birth\/mortality and migration will result, according to ISTAT, an increase in population and thus an increase in water demand.<\/p>\n
All these and other factors meant that WRI <\/a>(World Resources Institute in Washington) places Italy among the countries exposed in the medium term (2040) to the risk of severe(high) water stress.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
<\/div>Water Footprint<\/h2><\/div>
\u201cThe water footprint of a product is the volume of freshwater used to produce it, measured along the different steps of its supply chain.\u201d<\/em><\/p>\n
The concept of water footprint is an indicator referring to water use in consumer goods. The concept is similar to the ecological footprint and carbon footprint but, instead of soil consumption and use of fossil energy, it refers to water.<\/p>\n
Contrary to our common sense, however, the water is not all the same. There are three types of water involved in the production of agri-food goods (and not) and entering the water footprint calculation.<\/p>\n<\/div><\/div><\/div>
The colors of water<\/strong><\/p>\n
The blue water <\/strong>is the water of the lakes, rivers and underground aquifers. It can be derived from renewable sources that are recharged by rainfall and snowmelt or groundwater can be extracted from non-renewable fossil aquifers. It is easy to access and transport and can be measured, contained in dams, stored, pumped in water networks to meet the needs of different sectors (agricultural, industrial and domestic). Globally, 70% of this water is used for irrigation (FAO \u2013 AQUASTAT), but in some countries, even very dry (as Middle East or North Africa), this water use can exceed 90% of total consumption.<\/p>\n
The green water<\/strong> is rain or snowy water that does not become blue water, as it evaporates or it is transpired by the plants. It is almost exclusively used in agriculture and it meets the requirement for an 84% stake.<\/p>\n
The grey water<\/strong> is \u201cpolluted\u201d water, used to dilute contaminants in the production process and it is not reusable. So, it is not a source of water for human use.<\/p>\n<\/div><\/div><\/div><\/div><\/div>
The water footprint of a product is a geographically sensitive and explicit concept, it let us measure the consumption of water needed to produce a good in different geographical areas. For a same food product, in fact, the water footprint varies greatly from place to place, depending on factors such as climate, agricultural techniques adopted, the yield of crops, the abundant availability of rainwater or the need to use water irrigation, ecc.<\/p>\n
The sustainability of the water samples required to produce a food is very different depending on where and how this food is produced, because the amount of water needed to produce may not be the only variable, but also the \u201cquality\u201d of \u2018 water used (if blue or green) and the possibility that it is subtracted (in a situation of poor overall availability) to main uses (in particular for domestic use).<\/p>\n
The example of an orange<\/strong> (litres per orange 200 grams)<\/em><\/p>\n
![\"kenya](\"https:\/\/unabuonaoccasione.it\/wp-content\/uploads\/2016\/06\/kenya_aquifer_1460-e1775769892271.jpg\" "\\"kenya")
<\/span><\/div>![\"IMGmeat](\"https:\/\/unabuonaoccasione.it\/wp-content\/uploads\/2017\/05\/IMGmeat_5298.jpg\" "\\"IMGmeat")
<\/span><\/div>![\"hoekstra2\"](\"https:\/\/unabuonaoccasione.it\/wp-content\/uploads\/2016\/06\/hoekstra2.png\" "\\"hoekstra2\\"")
<\/span><\/div>![\"wwd](\"https:\/\/unabuonaoccasione.it\/wp-content\/uploads\/2016\/06\/wwd_2012_rice_cultivation-scaled.jpg\" "\\"wwd")
<\/span><\/div>![\"UlivoRuotatoSardegna2\"](\"https:\/\/unabuonaoccasione.it\/wp-content\/uploads\/2016\/06\/UlivoRuotatoSardegna2.jpg\" "\\"UlivoRuotatoSardegna2\\"")
<\/span><\/div><\/div><\/div><\/div><\/div>