major hazardous waste generator. The result was that her implementation of Superfund was designed mainly to delay regulation, and the subsequent controversy resulted in the resignation of Lavelle, EPA administrator Anne Burford, and several other top EPA personnel. In 1986, Congress passed the Superfund Amendments and Reauthorization Act, increasing funding to $9 billion and providing for studies and new technologies. By 1995, Superfund cleanup still took an average of twelve years per site, and costs for each site can range in the billions of dollars. Superfund, while showing improvements, has been probably the most criticized of environmental programs based on costs of remediation, implementation problems, and the questionable seriousness of the problems it addresses. Risk control policy Underlying the policy decisions made by the United States is the concept of risk control, consisting of two parts: risk assessment and risk management. The science behind risk assessment varies greatly in uncertainty and tends to be the focus of political controversy. For example, animal testing is often used to determine the toxicity of various substances for humans. But assumptions made about expected dosage and exposure to chemicals are often disputed, and the dosage given to animals is typically much larger than what humans normally consume. While industry groups tend to take a risk-tolerant position, environmentalists take a risk-averse position, following the precautionary principle. Another issue is the effect that chemicals can have relative to lifestyle choices. Cancer, for example, typically surface decades after first exposure to a carcinogen, and lifestyle choices are frequently more important in causing cancer than exposure to chemicals. While the governmental role in mitigating lifestyle-choice risks can be very controversial (see Smoking in the United States), chemical exposure through lifestyle choices can also occur involuntarily if the public is not properly educated (see Endocrine disruptors). Finally, the way that threats are presented to the public plays a large role in how those threats are addressed. The threat of nuclear power and the environmental effects of pesticides are overstated, some have claimed, while many high-priority threats go unpublicized. In order to combat this discrepancy, the EPA published a Relative Risk Report in 1987, and a follow-up report published by the Relative Risk Reduction Strategies Committee in 1990 suggested that the EPA should adopt a more pro-active posture, educating the public and assigning budgetary priorities for objectively assessed high-risk threats. Regulation of these policies are also very difficult to have