7 billion: How did we get so big so fast?

This NPR video explains how the global population has grown from 300 million to 7 billion.

Self-study activity:
Watch the video through in the first place and try to understand it and enjoy it as much as possible.

Now watch it again and say what the following figures refer to:

A thousand years
100 million
1804
200 years
10 billion

You can self-correct the activity and read the transcript here.