Today is the 40th anniversary of Earth Day, which is celebrated April 22 every year. We’ve come very far in 40 years in terms of individuals making a positive impact on the environment, particularly on cleaner air and water, but in many ways the challenges today are even greater.

Adam Rose has a great posted on Wired.com about the significance of the original Earth Day.

Larry Carroll offers up Earth Day lessons to be learned from the movie “Avatar.”

BusinessWeek explains how “air like split-pee soup” in LA helped spur the first Earth Day.

USA Today asks if at 40 Earth Day has gone too corporate.

There are tons of great articles out there, and frankly this is an exciting time as new technologies and a new commitment from government is spurring a real effort to accelerate the changes made over the past 40 years.