title: Green-sky thinking.
mesh_terms: D000401:Aircraft / Q000295:instrumentation* / Q000331:legislation & jurisprudence* / Q000592:standards; D057232:Global Warming / Q000331:legislation & jurisprudence* / Q000517:prevention & control*; D038622:Internationality; D014481:United States; D014484:United States Environmental Protection Agency / Q000331:legislation & jurisprudence*