But the science is settled, right?

Australia: Climate change, the Garnaut report, and the profit system

Garnaut admitted that the only feasible atmospheric greenhouse gas concentration target is 550 parts per million (ppm) carbon dioxide equivalent.

Back to 1988 on CO2, Says NASA’s Hansen - Dot Earth Blog - NYTimes.com

[James Hansen] and eight co-authors have drafted a fresh paper arguing that the world has already shot past a safe eventual atmospheric concentration of carbon dioxide, which they say would be around 350 parts per million, a level passed 20 years ago. (The atmosphere currently holds about 385 parts per million of the greenhouse gas.)

Trends in Carbon Dioxide--currently increasing about 2 ppm per year

Don't forget this from 1989:

A senior U.N. environmental official says entire nations could be wiped off the face of the Earth by rising sea levels if the global warming trend is not reversed by the year 2000. Coastal flooding and crop failures would create an exodus of "eco-refugees," threatening political chaos, said Noel Brown, director of the New York office of the United Nations U.N. Environment Program, or UNEP. He said governments have a 10-year window of opportunity to solve the [problem].