Updated: 01/21/2009 - It appears a majority of Americans don’t buy the theory of anthropogenic (human caused) global warming. Rasmussen reports in his latest poll. Forty-four percent (44%) of U.S. voters now say long-term planetary trends are the cause of global warming, compared to 41% who blame it on human activity. Seven percent (7%) attribute global warming to some other reason, and nine percent (9%) are unsure in a new Rasmussen Reports national telephone survey. Numbers have been moving in the direction of planetary trends.