Issues like global warming beg the question: just how politicized has science become? Science has no special immunity to ethical erosion: at least no more than economics, or religion. You can do anything with statistics, and it is becoming harder to know what to believe. Snarls like the Korean clone scandal aren't helping matters.
We must work to bridge this gap from both sides: the layman, by paying attention and asking the right questions, and the scientists, by refusing to succumb to biased partisan agendas or peddle inflated or otherwise distorted facts. Here's one article I read that tackles - or begins to tackle - the problem. (Hat Tip: Pajamas Media)