ClimateBiz: The very brainy people at McKinsey & Co. have figured out how we can to cope with global warming. All we have to do is: 1. Make buildings, cars, trucks, trains planes and factories a whole lot more energy efficient. 2. Generate 70 percent of global electricity from low-carbon fuels, including wind, solar, hydro, nuclear, and so-called clean coal which doesn’t (yet) exist. 3. Avoid the deforestation of 170 million hectares of forest, equivalent to twice the …