More than 300 businesses and 600 facilities are expected today to take part in California's bidding process for credits, as part of the ambitious law AB 32 which set up a cap and trade program designed to reduce the state's greenhouse gas emissions to 1990 levels by 2020. The auction will take place in spite of lawsuit filed yesterday by the California Chamber of Commerce challenging the authority of the auction process as well as raising concerns with the potential costs businesses could incur.