Here is an interesting resource on the Earth Day website that calculates your carbon footprint — i.e. amount of CO2 greenhouse gases your activities and lifestyle emits — based on the car you drive, whether you eat meat, the size of your house, and a number of other factors. Not only is it important to take its results with a grain of salt (they're fairly scientific, but I wouldn't bet my life on them), but your impact is probably underestimated due to factors they don't ask about, like what kind of lawnmower you have, or whether you unplug your televisions when they are not in use, or what your electric and water consumption is... there are more things than could be included in a simple quiz.
Still check it out if you want to see which areas that affect your carbon footprint you need work in. One of the more thought-provoking features of the results the calculator gives you is how many planets the world population would need if everyone lived like you. For me, that number is a lot more than two.
But wait, there's more!
There are many more footprint tools out there. Listed below are some of the best I've found on the web. All of them are pretty quick and easy, so feel free to give them a try. (Post your scores and we can compare!)
Clean Air-Cool Planet.
More on global warming and the environment soon.