Acid Rain Program Acid rain is a serious environmental problem that affects large parts of the US and Canada. This web site provides information about acid rain's causes and effects, how we measure acid rain, and what is being done to solve the problem.
Global Warming Global temperatures are rising. This web site provides information about the global warming problem, what is causing global warming, how serious it is, and what can be done to reduce and prevent it.
Ozone Depletion Ozone depletion is the result of a complex set of circumstances and chemistry. This web site provides information about the science of ozone depletion, information about the regulatory approach to protecting the ozone layer, and information on alternatives to ozone-depleting substances.