• Cash for Clunkers ends on Monday.
• ZoomPool, a new social network, connects carbon-conscious people who want to carpool.
• Baoding, China, becomes world's first carbon positive city.
• An international climate conference for teenagers results in 14 specific projects to help save the planet.
• The Obama administration approves a tar sands pipeline from Canada into the United States.
• Seven carbon traders arrested in England for tax fraud.
• Seattle rejects the plastic bag tax.
• Mercury contaminated fish found in nearly 300 streams nationwide.
• Homebuyers are paying more to live in neighborhoods with greater walkability.
• The revival of small retail might help fight global warming.
• Plastics in the ocean decompose and release hazardous chemicals.

Think I missed anything really great? Feel free to share it in the comments section. Want news updates every day? Check out my colleague Ben Jervey's blog on Greenlight.