The EPA is at the Supreme Court today fighting energy companies who don't want to have to apply for certification under the Clean Air Act. According to the companies, the Clean Air Act was initially crafted to deal with air pollution caused by cars, but the EPA seeks to extend its regulatory oversight to power plants. http://www.npr.org/2014/02/24/280944702/industry-challenges-epas-greenhouse-gas-rules-in-high-court
According to the Washington Post, the Clean Air Act, "has been described as one of the most complicated pieces of legislation on the planet." http://www.washingtonpost.com/politics/supreme-court-to-consider-epas-authority-to-regulate-greenhouse-gases/2014/02/23/ec5d4f88-9af4-11e3-ad71-e03637a299c0_story.html
According to the Washington Post, the Clean Air Act, "has been described as one of the most complicated pieces of legislation on the planet." http://www.washingtonpost.com/politics/supreme-court-to-consider-epas-authority-to-regulate-greenhouse-gases/2014/02/23/ec5d4f88-9af4-11e3-ad71-e03637a299c0_story.html