1. a) Who has polled a representative sample of the Earth's population?
b) Scientifically literate people believe in glacial cycles.
2. The problem is, most people, in fact ALL people, lack the first-hand knowledge of facts and the ability to systematically deduce from these facts and the relevant theoretical constructions the outcomes of changes such as the predicted increase in fossil fuel consumption. Science is a collaborative enterprise which depends on trust (~reputation~status~authority). Experts in geochemistry have to trust experts in astrophysics for the astrophysicists' contribution to the discussion. Field paleobotanists have to trust field meterologists for the meterologists' contribution. Experts in some disciplines even have to trust other experts in their own discipline, since no one has the time to dig into sandbanks on all continents for fossil trees and then to prepare slides and measure tree rings.
The social network analysis that Wikipedia claimed was plagarized is not the first critique of incestuous academic culture. See Wade and Broad,
Betrayers of the Truth: Fraud and Deceit in the Halls of Science, Martin Anderson,
Imposters in the Temple, and Charles Sykes,
Profscam. One of these (I don't remember which) reported the result of an experiment which a couple of professors of Sociology conducted. They copied published papers in social science, changed the authors' names and institutional affiliations from Mr. Big at Prestige Ivy U to Mr. Nobody at Alfalfa Community College, and resubmitted them. "Peer" reviewers shredded the papers. Sometimes, even journals that had originally published the work later rejected the same paper (without noticing the copywork).
According to one Math professor friend of mine, the American Mathematical Society tried blind peer review, where editors stripped names and institutional affiliations from papers that they sent to reviewers. It did not last. The problem was not that reviewers passes shoddy worked but that the reviewers did not appropriately revere the submitted fingernail clippings from Mr. Big at Prestige Ivy U.
I don't see a way around this, aside from the occasional outside challenge and periodic rebellion against the manipulation of peer review.