Agence France-Presse: New rules to cap US carbon emissions and promote clean energy could create as many as 540,000 US jobs a year, a green group claimed Tuesday, as the BP oil spill fueled debate over reform. With the massive Gulf of Mexico slick pushing energy reform to the top of the US political agenda, ClimateWorks — a climate lobby group — said reforms could also help the struggling US economy. Offering lawmakers the tantalizing prospect of curbing emissions while helping the economy, the …