"The Bella Center, the venue hosting the Copenhagen climate negotiations, is overflowing with advocates seeking action on climate change. But their opponents have turned out in force too. They're a little harder to identify than, say, the activists walking around dressed as trees. But working the crowds are some of the biggest climate skeptics in the business. I spotted British climate change denialist Lord Christopher Monckton on Monday, surrounded by reporters. Leighton Steward, the retired oil executive who now heads Plants Need CO2, is also here." Kate Sheppard reports for Mother Jones Dec. 9. 2009.