Why do we need so much water to produce everything?

Question

For example, i’ve read somewhere that we need around 3,7Litres of water to produce a single cigarette and 2700Litres of water to produce a single t-shirt. Why do we need so much water to produce stuff?

In: 96

Answer 1

The world’s population has increased a great deal in the past 100 years. In the past, ordinary rain was good enough. Now, we need to produce more food which requires more water than what we would normally get from rain. Irrigation has existed from centuries, but we need more of it now.