If you really want to strike a blow for the environment during Earth Day on Tuesday, do yourself and everybody else a favor and stop driving your car in town. Really -- who needs it?

This is not a message for you if you're a farmer or live in a rural area, where it's 20 miles to the grocery store and 100 miles to the nearest hospital. You can keep your car; it's a safety thing.

But for the rest of you -- those of you living, working and going to school in America's cities and big towns-- it's time to work toward something better. This year's Earth Day theme is green cities, and green cities should have no cars.

Read the full article by Eric Sanderson on CNN >>