"I suggested in my AAAS presidential address last year that everybody in the science and technology community who cares about the future of the world should be tithing 10 percent of his or her time to interacting with the public in the policy process on these issues...if all us just got out to the public more and talked to policymakers more, we would get more of this done."
Of course, it's more than just talking to the public, it's actively framing information in a way that remains accurate and true to the science, but that connects a complicated subject such as climate change to something the public already understands or values. It also means providing the incentives for scientists to devote their time in this way, which usually means creating financial rewards, such as additional NSF funding for public engagement initiatives.
I will have more on this subject, applied to climate change, in a forthcoming article at the journal Environment. For additional thoughts, see this recent column for Skeptical Inquirer magazine.