Business Green: US senators Barbara Boxer and John Kerry have introduced a new piece of environmental legislation into the senate known as the Clean Energy Jobs and American Power Act (PDF) in an effort to get some environmental legislation passed before the Copenhagen climate talks in December. The Act looks to impose tighter caps than the US Clean Energy and Security Act, currently stalled before the Senate, that was introduced earlier this year setting a mandate of 20 per cent below 2005 levels by …