text: U.S. Study Links Human Activity to Global Warming (Reuters) Reuters - Warmer temperatures in North America\since 1950 were probably caused in part by human activity, the\Bush administration said in a report that appeared to\contradict the White House position there was no clear\scientific proof on the causes of global warming.
inputs: U.S. Study Links Human Activity to Global Warming (Reuters) Reuters - Warmer temperatures in North America\since 1950 were probably caused in part by human activity, the\Bush administration said in a report that appeared to\contradict the White House position there was no clear\scientific proof on the causes of global warming.