Post Dispatch: There are many reasons otherwise sane and rational people reject the overwhelming worldwide consensus of scientists that climate change is real, that its caused by human activity, and that, unless drastic steps are taken, it will be catastrophic to humanity. For some, its a matter of pure economics. As author and journalist Upton Sinclair said, It is difficult to get a man to understand something, when his salary depends on his not understanding it. The fossil fuel industry pays a lot of salaries....