Climate Change: The Science
Coursera
Short introductory course from the Council on Foreign Relations covering the greenhouse effect, the acceleration of warming since industrialization, projected impacts, and how responsibility for emissions differs between countries. Ends with the policy debate over mitigation.
More resources on Climate Science
ipcc.ch
Official site of the Intergovernmental Panel on Climate Change, publishing authoritative climate science assessments and policy-relevant summaries. It hosts Assessment Reports and Working Group contributions, Summaries for Policymakers, methodological guidance, data resources, and news.
Skeptical Science
Volunteer-run site that answers common climate contrarian arguments, each rebuttal written at basic, intermediate and advanced levels with citations to the peer-reviewed literature. Useful for checking a specific claim and finding the underlying research.
NASA Climate Kids
NASA's introductory site explaining the greenhouse effect, carbon cycle, sea level rise and weather versus climate through short articles, games and videos. Gives newcomers of any age a plain vocabulary for the basic mechanisms.
The Uninhabitable Earth
Survey of projected consequences of warming, from heat death, food shortages and drowning coastlines to disease and conflict, followed by chapters on politics, economics and how societies narrate the crisis. Conveys the scale of impacts at different warming levels.