Cook should do surveys for these questions too (and include replies from more than 100 people):<p>If human activity is causing global warming, is that a good or bad thing?<p>If that is a bad thing, does it present an existential threat to our civilization?<p>If it presents an existential threat, is it the most significant existential threat our civilization currently faces?<p>If it presents an existential threat, can our civilization do anything about it?<p>Where does the danger of global warming rank compared to the danger of, say, population growth? Other pollution? Terrorism stuff? Nanobot grey goo?<p>If our civilization can do something about an existential threat from global warming, could a cap-and-trade or some other kind of government policy be a good solution?<p>If etc, could the dynamics of our culture, markets, or technology be a good solution?