Age: Opposition Leader Brendan Nelson is even worse on climate change than former prime minister John Howard, the Rudd government says. Dr Nelson has said the coalition is committed to introducing an emissions trading scheme “probably” by 2012. His refusal to commit to a firm starting date prompted Finance Minister Lindsay Tanner to say the coalition was in the climate change denier camp. “Dr Nelson is hostage to the deniers in his own ranks,” he told ABC …