Economic Benefits of Improvements in  Acid Rain Provisions of the 1990 Clean Air Act Amendments.
Economic Failures of the Decline in Acid Rain Provisions of the 1930 Clean Air Act Amendments.
mnli hypothesis: Economic Failures of the Decline in Acid Rain Provisions of the 1930 Clean Air Act Amendments. premise: Economic Benefits of Improvements in  Acid Rain Provisions of the 1990 Clean Air Act Amendments.