Business Green: Senior Democrat Senators are to unveil a new draft climate bill tomorrow, intended to build on the Waxman-Markey bill passed by the House of Representatives earlier this year and reinvigorate efforts to pass US climate change legislation. Senators Barbara Boxer and John Kerry said they would present new legislation on Wednesday with the aim of delivering a Senate vote on the controversial legislation before the end of the year. The Boxer-Kerry bill is based mainly on the …