Perceptions of scientific dissent undermine public support for environmental policy

This article shows that even modest amounts of scientific dissent reduce public support for environmental policy. A survey experiment with 1000 Americans demonstrates that small skeptical scientific minorities can cast significant doubt among the general public on the existence of an environmental problem and reduce support for addressing it. Public support for environmental policy is maximized when the subjects receive no information about the scientific debate, indicating that the general public's default assumption is a very high degree of scientific consensus. Accordingly, a stronger scientific consensus will not generate public support for environmental policy, unless skeptical voices become almost silent.