There is a great deal of uncertainty involved, so exactly which measures are necessary from a social or political perspective is difficult to determine (caps, etc). The general consensuses among sociologists are that...
A) Popular consumer-oriented notions of mitigation will never curb climate change and mostly serve to maintain the status quo / sell products (Prius won't help).
B) Contrary to a popular belief, laypeople largely do not "lack information" on the issue - "apathy" toward climate change is cultural, an active process unto itself, with most individuals feeling powerless and largely unable to find a forum to discuss the issues.
C) Climate change and its mitigation affect individuals and groups disparately, with those most socially and economically disadvantaged taking on disproportionate risk, both on a local and global scale. This includes women.
D) Climate change denial is largely an American phenomenon funded by oil companies via conservative think tanks. Climate change deniers are statistically more likely to be conservatives, white, males, and middle-aged.
E) By and large, the notion that technology will advance to a point that climate change is easily mitigated is not accepted by sociologists. The question is raised: Is climate change an inevitable consequence of unchecked capitalism? Sociologists broadly agree that it is.
F) Realistically mitigating climate change to the point that especially those most disadvantaged (think rising sea levels, etc.) are not drastically affected is dependent upon a broader political and economic transformation, globally. Many environmental sociologists feel that environmentalism fundamentally coincides in its goals with feminism and/or marxism - there is talk of overlapping forms of oppression with more or less singular sources.
Many sociologists remain optimistic regarding climate change, and work as advocates as well as scientists. Despair is useless. However, the solutions to climate change are very complex, because climate change is a fundamental counterbalance to the level of production that maintains many nations. While Marx may have been wrong about the revolution disrupting the sustainability of capitalism, he did also foresee that natural resources would fail to sustain capitalism, and in that he seems to have been correct.