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This calculator helps you estimate your total water use. You know water comes from the tap, but do you know how much water goes into your sandwich? Your gadgets? The electricity that powers them? Find out here.

This calculator looks at the environmental impact of foods and their ingredients. It includes getting foods to you, but also getting waste foods away from you, and to the landfill.

Calculate the impact of travel, home and shopping habits with this simple carbon footprint calculator, developed and published by the Guardian.