I have always heard that the real reason nuclear (touted as the carbonless energy source) isn't viable is because there isn't enough water to keep reactors cool. And I knew traditional power plants used water to keep cool too (notice, they're almost always on a lake or river?).
As a result, water issues will impact future energy choices, and energy companies will increasingly be called upon to be partners in managing the world's water resources. As the report says, "Water is life, so we need to connect the dots on this critical issue for global policy-makers and leaders."