How can you find out if carbon offsets are really reducing greenhouse gas emissions? The Federal Trade Commission and other groups are working on solutions.
carbon offset
Who Regulates Retail Carbon Offsets?

US House's Carbon Offset Purchase Ineffective?
The effectiveness of the US House of Representatives Carbon offset purchase is pulled into question. Part of the "Green the Capitol" initiative, this offset may or may not help cancel out greenhouse-gas emissions from House buildings.
Bank of America Releases A Carbon Offset Credit Card
Bank of America has teamed up with Brighter Planet to offer a credit card that earns points to purchase carbon offsets.

Gas Company Goes Green
In conjunction with The Climate Trust, NW Natural from Oregon is now offering its clients carbon offsets by investing in methane capture systems.