The Acid Rain Program also monitors and limits emission of NOx. In New England, the Acid Rain NOx rules have not had a noticeable effect, because other programs have imposed more stringent limits. The Acid Rain Program also promotes the use of renewable energy and energy conservation. Some allowances were set aside to award to companies which encouraged residential, commercial, and industrial conservation or used certain forms of renewable energy. Six New England companies were awarded 4186 allowances for energy conservation and for using biomass and landfill gas as a source of energy.
Allowances are also available for solar, wind, and geothermal energy.
New England States have also been active in the fight against acid rain. Prior to 1990, Massachusetts and New Hampshire had passed laws limiting the emissions from power plants. The United States has been working with Canada to reduce transboundary effects of Acid Deposition. A bilateral Air Quality Agreement was signed in March 1991. The third biennial report, published in 1996, focused on the progress made by the United States and Canada in achieving emissions reduction goals.