Earth breath

One of the most interesting things pointed out in An Inconvenient Truth can be seen in this graph, which measures the growing amounts of carbon dioxide levels in the atmosphere.



Disregard the overall increase (but don't disregard it too much, of course) and notice how the levels go up and down every year, like teeth on a saw. This is because each year green plants take in carbon dioxide when they're growing and give it off when they die in the fall. It's like every year the whole earth takes a giant breath. Ahhhhhh.

Isn't that cool?

On a related note, Stephen Hawking says we need to establish colonies in space soon to ensure the survival of the human race.

[I]f humans can avoid killing themselves in the next 100 years, [Hawking said,] they should have space settlements that can continue without support from Earth.

"It is important for the human race to spread out into space for the survival of the species," Hawking said. "Life on Earth is at the ever-increasing risk of being wiped out by a disaster, such as sudden global warming, nuclear war, a genetically engineered virus or other dangers we have not yet thought of."

My bet? We don't make it in time. Thus my theory of time travel would work out perfectly. Mwuhahaha.