Global Warming and the Polar Vortex

The video discusses the polar vortex, explaining its nature and effects. It highlights the misconception that cold weather disproves global warming, emphasizing that global warming involves an increase in trapped atmospheric energy, affecting climate globally. The speaker stresses the importance of thinking globally about climate change, as local weather changes do not reflect global trends.

What percentage of the world's area does the speaker estimate the US occupies, and what is the actual percentage?

In what ways does the speaker suggest we should think about global warming?