Maine Environment Links on Acid Rain Maine DEP Acid Rain page  (http://www.state.me.us/dep/air/acidrain/index.htm) Introduction to acid rain, with a short list of links. [mainegov] EPA's Clean Air Markets Program: Acid Rain  http://www.epa.gov/airmarkets/acidrain/. Home page for the U. S. Environmental Protection Agency acid rain program. Many links to data sources and resources for students and teachers. [usgov] United States Geological Survey Acid Rain Data and Reports.  http://bqs.usgs.gov/acidrain/ Data and introductory material. [usgov] National Atmospheric Deposition Program   http://nadp.sws.uiuc.edu/ Data from a "nationwide network of precipitation monitoring sites," which includes ten locations in Maine. [ind] Acid Rain Retirement Fund:   (http://www.usm.maine.edu/~pos/alin.htm)    Home page for a nonprofit organization based in Portland that buys sulfur dioxide emission permits, and retires them..."buying pollution right out of the sky." [ind] Hubbard Brook Ecosystem Study   http://www.hubbardbrook.org/ Hubbard Brook is a long-term ecological research project located in the White Mountain National Forest, near North Woodstock, New Hampshire. Extensive website, with good resources for students and teachers. [ind] Acid Rain: The Green Lane  (http://www.ec.gc.ca/acidrain/)  Acid rain page from Environment Canada. [cangov]    Search Maine libraries for books and government documents on acid rain in Maine   ~For additional related links, see also the Maine Environment Links page for Air Pollution