Over the past few years, Earth Day has picked up a lot of steam at MIT. In fact, this year the Institute set aside four days for sustainability-related exhibitions, fairs, and a film screening. Visit the Sustainability @ MIT Web site for details and a full schedule.

And if it’s been awhile since you calculated your ecological footprint, check out Earth Day Network’s sleek new calculator. Choose an avatar, and then answer a series of questions to find out how many planets it takes to support your lifestyle. Once you’ve got the number, record it in the poll below.

Screenshot of footprint calculator.

Screenshot of footprint calculator.