Recently, there was an article in the NYT about the declining belief in global warming, and/or its negative impacts in Europe.
I would like to suggest that all scientific problems be solved with polls. We simply ask a representative sample whether Yang-Mills theory exists and has a mass gap, whether the Riemann Hypothesis is true, or the best course of action regarding a quantized theory of gravity: is it a) Strings, b) Loops, c) Triangles, d) Entropy, e) I Don't Know, or f) I've Never Studied Gravity, But I'd Like to Say It's (a) Based on No Information Whatsoever. This is far easier than doing science.
[As an aside, society as a whole pays quite of bit of money to have scientists around in order to have opinions on scientific topics. I've never quite understood the propensity for people to then dilute their paid expert opinion with their own opinion. It's like going to a restaurant and insisting on cooking your meal yourself. The division of labor has given us so much!]
Unfortunately, the belief that global warming is happening/bad/imminent is strongly correlated with the actual temperature.
In the article, first poll was taken in November 2009 after an above average temperature summer and the second poll was taken in March of 2010 after an unusually cold winter. That led to a drop in belief that global warming was happening and man-made from 41% to 26%.