the simple argument: we need water.
Sometimes the most important way to understand a problem is also the simplest. In that light, here’s a problem. The world has a fixed water supply and we are not using it well. The availability of clean water is becoming more and more limited for many reasons, of which a major part is energy use. Make the problem simple:
The greatest use of freshwater in the U.S. is to cool electric power plants, comprising 41 percent of the total. Most is withdrawn from lakes and rivers. Of today’s two main power production options — coal and gas — gas uses less than half the water, emits almost no air pollution, and releases less than half the carbon dioxide of coal. Wind power, which is expanding quickly across the U.S., uses no water and produces no emissions. By reducing demand, energy efficiency also cuts water use and CO2 emissions.
That’s a problem, and it cannot be argued. It is complicated severely by the reality of climate change. But even if one does not accept climate science, this is still a major, global, human, environmental and social problem. Providing water for the current human population, let alone the generations that will (hopefully) thrive on the planet for next several millenia, requires actual changes at every level, including moving toward energy sources that are not water intensive, i.e. coal, nuclear, and gas.
This is as simple as environmental concern can get: We need water.