The Substitute 5

Which is not to say excess carbon dioxide is totally fine. We can't breathe it, and that same logarithmic scaling will work against us if we try to reverse the process (we'll have to remove a shitton before we see a positive change). But it isn't the only player. Policies meant to retard or reverse global warming would do well to remember methane, for instance. There are some cool things we can do to curb methane emissions:

• The fumes off decaying garbage can be sucked up and used to generate power.
• Technological improvements can not only reduce fossil fuel consumption, but also prevent innumerable traffic accidents caused by people making u-turns at busy intersections to save 2¢ a gallon on gas.
• Pigs and cattle can be replaced by sentient tofu, making drives through the heartland a lot less stinky.