Dr. James Hansen, the head of NASA Goddard, has been an advocate pushing us to reduce carbon dioxide emissions since before I was born. Here is his latest plea, in the form of a TED talk.
All of the topics Trenberth and Hansen discuss are the focus of a course I teach called Global Climate Change (MTR 1600). Please sign up for this course this coming fall if you are interested in learning more! Here's the course description:
This course presents the science behind global climate change from an Earth systems and atmospheric science perspective. These concepts then provide the basis to explore the effect of global warming on regions throughout the world. This leads to the analysis of the observed and predicted impacts of climate change on these regions; the effect of these changes on each region’s society, culture, and economy; and the efforts of these regions to mitigate or adapt to climate change. The interdependence of all nations will be discussed in regards to fossil fuel-rich regions, regions responsible for greenhouse gas emissions, and regions most vulnerable to the impacts of climate change. (General Studies Level II - Natural Science, Global Diversity)