Excerpt:Â Environmental advocates have endorsed carbon neutrality; they purchase carbon offsets to neutralize their impact on fossil fuel consumption and therefore global warming. But why the half-step? Why not try for a negative carbon footprint? Don't use any hydrocarbons and buy the offsets. Being "carbon neutral" has also become a trend in business â€“ acquiring carbon offsets to allegedly neutralize the effects of the hydrocarbons they have burned. Typically, this involves planting trees and so forth.