UNIT NINE: GOVERNMENT REGULATION 430
longer poses any threat. Must 100 percent of the contamination be removed, or would removal of some
lesser amount achieve a reasonable degree of environmental quality?
3. No one knows how long-term exposure to random combinations of drugs will affect
humans or wildlife. There is little scientific evidence about the long-term effects. The federal
government does not require drinking water to be tested for drugs, so we do not know for certain
whether a particular source of drinking water is contaminated. Requiring that water be tested—and that
4. The effect of the release of substances that contribute to global warming, like pollution
generally, does not respect political borders. Indeed, one of the reasons that the federal government
became involved in environmental protection was that state regulation alone could not solve the
problem of air or water pollution. This underscores the fact that the world is a global community. What