'''Global warming theory''' is the [[theory]] that human actions are responsible for the [[warming trend]] that has been in progress since the bottom of the [[Little Ice Age]] - at about the time of the [[American Revolutionary War]]. [http://www.sitewave.net/news/s49p1834.htm]
'''Anthropogenic global warming''' is any increase in global average air temperature caused by human activities.
The theory enjoys broad based political support from [[Liberals]], [[Greens]] and the US [[Democratic Party]], and theory supporters frequently assert the existence of a "[[scientific consensus]]" favoring their viewpoint (see [[Politics of global warming]]).