Australian Broadcasting Corporation: SARAH FERGUSON, PRESENTER: Democrat Congressman Henry Waxman has been one of the biggest players in US climate policy for decades. He steered landmark clean air bills through Congress and in 2009 almost secured a national emissions trading scheme for the US, a bill that was narrowly defeated by House Republicans. His home state of California, the eighth largest economy in the world, has had its own emissions trading scheme in operation for 12 months. He's also famous for securing the testimony...