Worst idea: 2009 seems to have been the year that
global warming deniers shifted from claiming that climate disruption is a hoax to claiming that climate disruption is too big and too far along to stop, so there's no point in doing anything about it.
But the American situation has
shifted, too: with 2014 coming in as the
warmest year in the instrumental temperature record, and 2015 on track to smash that record, it has become difficult to
deny that the
global warming trend is indeed continuing.