Thanks for the info. Quoted from Wikepedia:

Beginning around 1850, the world's climate began warming again and the Little Ice Age may be said to have come to an end at that time. Some global warming skeptics believe that the Earth's climate is still recovering from the Little Ice Age and that human activity has nothing to do with present temperature trends. There is a wide consensus among climate scientists, however, that the present sharp upturn in temperatures is primarily caused by the increased proportion of CO2 in the atmosphere caused by human activity.