More than hot air.
D000397:Air Pollution / Q000517:prevention & control; D004784:Environmental Monitoring / Q000331:legislation & jurisprudence*; D035082:Federal Government; D017752:Greenhouse Effect; D006801:Humans; D011634:Public Health / Q000331:legislation & jurisprudence*; D014481:United States; D014484:United States Environmental Protection Agency / Q000331:legislation & jurisprudence*