Almost every day, there is fresh evidence and striking headlines that make the complex connections between food, water and energy unavoidably real and impossible to ignore.

A recent report from the New Scientist suggests that droughts across the United States are having an impact on the country's power supply.

At the same time, India's widely reported power problems, which plunged 670 million people into darkness and crippling heat are now being blamed on water shortages.

The link between the US droughts and energy production is most direct, and perhaps the easiest to explain.