National Atmospheric Deposition Program (NADP) - US federal-state-NGO cooperative effort operating a national precipitation monitoring network to observe geographic and temporal trends in acidity, mercury, and other attributes. Includes data, maps, and meeting announcements.
UK Acid Waters Monitoring Network - Monitors the ecological impact of acid deposition in areas of the United Kingdom believed to be sensitive to acidification.
US EPA - Acid Rain - Information about causes and effects, how acid rain is measured, and what is being done to solve the problem. Includes activities for students.
US EPA Acid Rain Program - About EPA efforts reduce electric utilities' emissions of sulfur dioxide and nitrogen oxides, the pollutants responsible for acid deposition. The program includes a system of tradable SO2 emissions allowances.
