Global Warming. I'm not here to dispute wether or not it's real or actually happening.
Yeah, the earth heats up a little every year. It's a fact of life. The sun warms the earth. And the other fact of life is that there is an increase in CO2. I mean, look at how many fricken cars are on this planet!
Anyway, I know how to fix our problem. It may not help right away, but it could eventually, as long as every person on Earth is committed to the plan.
Plant trees. Plant lots of trees. Plant trees in every avaliable space. Don't cut them down. Stop building more houses. Just plant more trees. Trees like CO2, right? Duh.
So plant trees, stop building, and just let the world go on. Oh geez.