Climate change is one of the most complex areas of scientific study out there, causing physicists, chemists and meteorologists alike to scratch their heads -- so it's understandable that the rest of us find it a little difficult to grasp. But this video is your best chance yet of understanding the topic.
Imagine our atmosphere as a massive games of Tetris, where the blocks are molecules of carbon dioxide. As the games progresses, the screen fills up, and you're unable to get rid of the blocks quickly enough. That's exactly what's happening to our atmosphere, as we create more and more CO2 to fill the air above us -- and if the screen fills up, it's game over. Only, unlike a game of Tetris, we can't start over. [TED-Ed]