Here's something interesting I received from the periodic email sent out by Sustainable St. Louis:

Ever wondered how much "nature" your lifestyle requires? You're about to
find out.

This Ecological Footprint Quiz estimates how much productive land and water
you need to support what you use and what you discard. After answering 15
easy questions you'll be able to compare your Ecological Footprint to what
other people use and to what is available on this planet.

See http://www.earthday.net/footprint/index.asp.

My score was 12, about 1/2 that of the average US resident. Still, that means if everyone lived like I do, we'd need 2.7 planets.

Looks like I have some work to do.