7 Billion And Counting - Earth Day

Video by National Public Radio (2.33 minutes)

At the end of 2011 The U.N. said the world's population reached 7 billion. A little more than two centuries ago, the global population was 1 billion. What happened? Let's see how the Earth can produce that kind of a crowd.

Watch the clip and complete the following notes with one or more words:

"...A thousand years ago there were only a third of a billion people. Now there's 7 billion of us.

How did we grow _________?

...The fuller the glass gets _________

Water drips in as_________

water drips out as_________

a thousand years ago the Americas are

better medicide and better agriculture are starting to slow the leak
_________the glass

more babies gro up and
_________ have babies of their own

The UN says we'll level out at 10 billion by

Can the world hold that many people?

Experts can't agree. It all depends on
_________ our food, water and energy."

Answers here!

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