Most of it.
However, man's small contribution to climate change can possibly tip the balance and that is something we should guard against, or at least try to measure and be aware of.
Been a bit slack keeping up with this thread, so in order to make up time, here's perhaps a hundred or more records all at once!(and some pretty cool pictures too)
http://www.bbc.com/news/world-us-canada-31538987
as a casual observer, i've not seen much evidence of the weather indicating global warming up in Essex this year, still taking a pickaxe to the car winshield most mornings data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7.
July was Earth's hottest month on record, NOAA says - BBC News
Apart from Essex ^^^^^^^^^^^^^^^^^^^?
Hottest UK November day recorded in mid Wales - BBC News
Just in time for the big Global climate conference coming up in France.