How long do you think it would take you to understand the mechanism that leads to global warming?  Years?  Months? Days?  Nope.  Fifty-two seconds:

[youtube http://youtu.be/R-qtr9xKwow]

If you want more information, How Global Warming Works has one, three, four, and five minute versions that go into greater detail.  I love examples of elegant learning like this.