Life+After+People

An interesting video! Lots of thinking going on after, good to see! Now I have a few questions for you! No more than 20 minutes, have at it!

1. Why do the lights start going out in hours? 2. Why would subway tunnels fill with water? 3. What happens to household pets? 4. What happens to concrete and buildings in the years after we disappear? 5. What happened at Chernobyl? Why is it such a good example of what would happen if people disappeared from the earth?

What questions do YOU have about "would happen if we all disappeared"?