New York Times: I have seen the future, and it won’t work. These should be hopeful times for environmentalists. Junk science no longer rules in Washington. President Obama has spoken forcefully about the need to take action on climate change; the people I talk to are increasingly optimistic that Congress will soon establish a cap-and-trade system that limits emissions of greenhouse gases, with the limits growing steadily tighter over time. And once America acts, we can expect much of the world to …