Twenty-five years ago, the Cuyahoga River in Ohio was so contaminated that it caught fire, air pollution in some cities was thick enough to taste, and environmental laws focused on the obvious enemy: large American factories with belching smoke-stacks and pipes gushing wastes. Federal legislation has succeeded in providing cleaner air and water, but we now confront a different set of environmental problems - less visible and more subtle. This book offers ideas on how America can respond to changing public health and ecological risks and create sound environmental policy for the future.