Changing climate.(Brief Article)

Seven of the world's largest natural resources groups are to pool their efforts in an attempt to combat climate change. Two petroleum companies (BP and Shell), the chemical company DuPont, the energy company Suncor, the electricity utility Ontario Power Generation, and two aluminium producers (Alcan and Pechiney) have joined forces with the US pressure group Environmental Defense to create Partnership for Climate Action (PCA). The primary purpose of this joint venture will be to champion market-based mechanisms (such as emissions trading) as a means of achieving "early and credibl