182. MTBE (gas additive)
In 2000 the EPA announced plans to phase out over 4 years the gasoline additive MTBE which had been found to be contaminating ground water supplies. These were canceled when Bush took office. As a result, MTBE is still in use but, due to law suits against oil companies, state bans, and lack of Congressional agreement in 2005, its production is half of what it was.
