Under a new clean air proposal, the government has decided to tighten controls on the release of certain toxic chemicals, including benzene, formaldehyde, and other carcinogens, by chemical plants. The stated purpose of this proposal is to reduce cancers caused by air pollution. Yet, the chemical industry, rather than the government, is responsible for monitoring the implementation of the proposal. If the past actions of certain polluters in the chemical industry are any indication of future behavior, the net result of the new proposal will be an increase, rather than a decrease, in carcinogens released into the air. The author is arguing that __. ['no chemical companies can be trusted to follow the clean air proposal', 'to ensure effective implementation, the government should always monitor the execution of its proposals', 'allowing self-monitoring for the new clean air proposal will result in the opposite of its intended consequence', 'benzene and formaldehyde are two of the most hazardous cancer-causing chemicals']