Even if you just look at environmental factors, we're more likely to die either from the bee population dying due to pesticides, or because of the massive increase in routine use of antibiotics in meat production. Neither of which really get much media attention, maybe because they're both issues caused by science, and people like cheap food.
But at the end of the day we're going to die from overcrowding . The population has doubled in the last 30 years. (Hence why science has to make horrible dangerous food to feed them all).
Whether your fellow man believes in global warming is pretty irrelevant, and whether he believes in evolution is even less relevant to anything that matters. You're certainly not going to die from global warming!
Your comment is the sort of "scientific fundamentalism" I was talking about.