for food and agriculture – Managing techniques in danger. Food and Agriculture Organization of the United Nations, Rome and Earthscan, London. Eutrophication – the air pollution of water our bodies and ecosystems with excess vitamins – is a significant environmental problem. The runoff of nitrogen and different nutrients from agricultural production methods is a leading contributor. In the visualizations right here we show the scarcity-weighted water footprint of foods, measured in liters per kilogram, 100 grams of protein, and per a thousand kilocalories.