This is the second half of a speech Australia's chief scientist delivered to the Carbon Market Institute Conference in Melbourne this week. The first is available here.
I know that there are issues of legitimate and continuing debate: the sensitivity of the climate to increases in CO2, the role of the oceans in warming, the extent of warming into the future, the regional impacts of warming to name just a few. All need further work and the soundness of our knowledge will depend on the scientific method: observation, robust scrutiny, peer (or expert) review, skepticism and replication. We will learn more as we do more.