The document discusses several topics related to regulating greenhouse gas emissions and transitioning to renewable energy sources:
1) It argues that the EPA has the authority to regulate greenhouse gases under the Clean Air Act and discusses several Senate votes and bills related to regulating emissions from the oil, gas and coal industries.
2) It provides statistics on U.S. greenhouse gas emissions and their top sources, and suggests policies like cap and trade could help reduce emissions while creating new jobs.
3) It discusses the growth of carbon trading markets globally, with the EU ETS being the largest, and outlines the EU's goals to expand these markets to more countries and sectors over time.
4) It highlights Germany's success