Last fall, Slate and Treehugger.com teamed up to encourage readers to go on a “carbon diet” to reduce their personal carbon emissions through conservation, reducing miles driven, eating organic and local, etc. They’re “back by popular demand” with another challenge.

From their press release:

“The United Nations says the average American is responsible for nearly four times the carbon-dioxide emissions of the rest of the world,” said Jacob Weisberg, Slate’s editor. “Last year’s challenge demonstrated the eagerness of our readers to take action on an individual level, and this year we’re hoping to make it even easier for them to do that. We are excited to be working again with our friends at Treehugger, who have been excellent partners.”

Each week of the Green Challenge opens with a short quiz, followed by easy actions people can take to reduce their individual carbon output. Once participants have registered, Slate will monitor individual progress in losing carbon poundage and collective poundage lost by individuals taking the challenge. Those who miss the launch date may start at any point by taking the initial quiz.

“The Green Challenge is our way of showing the world that a sustainable decrease in toxic carbon emissions is accessible and relevant to everyone,” said Graham Hill, founder of TreeHugger. “Our goal is not to scare or pontificate, but to educate and engage.”

Slate was recently nominated for a National Magazine Award by the American Society of Magazine Editors (ASME) in the area of General Excellence Online for the 2006 Green Challenge.

For more information, click here. To get started click the pic below.

(pic from TH)