<prompt> Translate the following text to EnglishSheria ya hewa safi Clean Air Act, CCAA - Uchunguzi wa Matarajio ya Gharama na Faida 1999: Ushauri wa Baraza la Ushauri juu ya Gharama na Faida za Ufuatiliaji wa Hewa safi wa CAA  <response>: The Clean Air Act Amendments CAAA Section 812 Prospective Study of Costs and Benefits 1999: Advisory by the Advisory Council on Clean Air Compliance Costs and Benefits of the CAAA. 