More Energy Calculators

There are, of course, a huge number of calculators online that offer visitors the chance to discover just how nasty or nice to the environment our living habits actually are. My beef with these calculators is twofold:

• They rarely explain the math behind the calculations.
• They often gloss over many of the ways in which we impact our environment.

I've just stumbled across a calculator that seems to address at least this latter problem. The Personal Environmental Impact Calculator breaks down your energy use into transportation, recycling, water, and energy. It's not exactly the sexiest calculator out there, and there are a few broken links but most of the results are well documented, and provide helpful conservation suggestions and further reading.