The phrase "carbon offsets" doesn't tell you a whole lot, which most likely accounts for some of the confusing around the topic. Carbon offsets are, in fact, purchased. Carbon offset organizations are essentially fund raising organizations which take the money you spend buying "offsets" and use it in big ways that individuals may not be able to -- for instance, to fund large alternative energy projects. So the idea is, if you drive your car 1500 miles and produce 1300 lbs of CO2, then you would buy enough carbon offsets to plant 82 trees and negate that 1300 lbs of CO2. Read More »