A lead author of the Intergovernmental Panel on Climate Change – the group that shared last year’s Nobel Peace Prize with Gore – told the experts that spending $800 billion over 100 years solely on mitigating emissions would reduce inevitable temperature increases by just 0.4 degrees Fahrenheit by the end of this century. Even accounting for the key environmental damage from warming, we would lose money, with avoided damages of just $685 billion for our $800 billion investment.