Business Green: Capitol Hill officials are cautiously optimistic the Waxman-Markey climate change bill will be passed by the House of Representatives this Friday, after President Obama used a press conference to call on wavering Democrats to back the controversial legislation. Praising the “historic” bill, Obama said the new legislation, which includes binding emissions caps as part of a nationwide cap-and-trade scheme, would lead to a “transformation that will reduce our dependence on foreign oil …