Over the past few months, Pfizer has found itself alone among its peers in maintaining its support of the Heartland Institute, a highly controversial group that pooh-poohs global warming and believes anti-smoking campaigns are based on junk science. But negative publicity over contributions has prompted Bayer, Amgen, Eli Lilly and GlaxoSmithKline to disassociate themselves from the non-profit. Pfizer, however, perseveres. In 2010, the drugmaker contributed $130,000, according to a Heartland document (see here) and $65,000 last year. Meanwhile, Pfizer expects to contribute another $45,000 this year and is considering future donations for 2013 and beyond, according to Forecast the Facts, an advocacy group that is pushing companies to cut their ties.