The quantity of greenhouse gases released during the industrial production of the stuff we all consume. And why production (rather than consumption) estimates flatter developed countries’ carbon footprints.

Why the total lifecycle greenhouse gas emissions of wind, solar, hydro, nuclear, and geothermal are at least ten times lower than fossil fuels. How natural gas emissions can be just as bad as coal. And why biofuels are not as low-carbon as you might assume.