Portland Tribune: My greenhouse is covered with a thin plastic film. A few molecules of plastic are all it takes to make it 30 degrees Fahrenheit warmer inside than out.
When coal, gasoline and natural gas are burned, they produce carbon dioxide that traps heat just like the plastic film of my greenhouse.
Green plants recycle carbon dioxide, but they can't keep up with the amount that we put out. Two hundred years ago, atmospheric CO2 levels were 280 parts-per-million; now they're more than 395 ppm. Every year...