There are a few things that concerns me about some of these claims (and Yahoo who I work for claim this too). It removes the impetuous inside the company to re

There are a few things that concerns me about some of these claims (and Yahoo who I work for claim this too). It removes the impetuous inside the company to reduce carbon wastage because they just offset instead. I'm not convinced by the way they claim to measure the carbon use. At Yahoo flights are often booked at the last minute, people often get rental cars when travelling, etc. I doubt that anyone has a full grasp of the real cost of carbon in the company, let alone an external organisation charged with offsetting for us.