Want more proof ?
Source:
http://www.ncdc.noaa.gov/oa/climate/globtemp.html
Change in glaciers length:
Source:
http://www.ncdc.noaa.gov/img/climate/globalwarming/ipcc18.gif
For the Northern Hemisphere summer temperature, recent decades appear to be the warmest since at least about 1000AD, and the warming since the late 19th century is unprecedented over the last 1000 years. Not 50 years, Bryant...
Source:
http://www.ncdc.noaa.gov/img/climate/globalwarming/ipcc20.gif
Again, we can discuss if this was caused by human activity or not, but the facts are here and solid.
Aurel