Human generated CO2 has been demonstrated to be a very tricky and deceptive molecule. In some places it blocks outgoing longwave radiation, but for unexplained reasons the troublesome little buggers have chosen not to do that in North America.
Climate change hardly visible in North America
Canada, U.S. buck trend, scientists say
BY TOM SPEARS, OTTAWA CITIZEN MAY 6, 2011
When your lawn scorches or the geraniums croak, it may be premature to blame global warming. One of the world’s top science journals says climate hasn’t changed in most of North America -yet.
Disclaimer : CO2 reserves the right to start trapping excess heat at any time.