Respondents were given a list of 88 things that could inspire fear. These entries ranged from world problems (like war, terrorism, nuclear attacks) to practical fears (murder, death, unemployment) to uncommon phobias (zombies, clowns, ghosts). ... Also on the list was global warming, which leading Democratic candidates have said is the biggest threat facing Americans today. But the American Fears survey revealed a much different opinion on the topic, with only 30.7% of respondents saying that global warming made them either afraid or very afraid. Global warming did not even make the top twenty. Here are some things Americans are...