From left, progress is being made in the use of wind turbines, solar panels and water treatment to create energy savings. But, the energy analyst Jesse Jenkins says, “I just don’t see a World War II-style mobilization happening for anything other than a world war.” Credit From Left, Francis Joseph Dean/Rex Features, via Associated Press; Carlos Barria, via Reuters; Stuart Palley for The New York Times The pledges that countries have signaled they will make in Paris over the next two weeks to cut emissions will inevitably fall short of what is needed to solve the problem of climate change . But many political leaders gathering there — including governors, mayors, and provincial cabinet secretaries — are pushing for more aggressive cuts. By the dozen, they are signing a voluntary agreement committing their jurisdictions to faster and deeper reductions in emissions of greenhouse gases than their national governments […]