Abstract
This article provides a theoretical policy-making model of chemical sunset that gradually substitutes green alternatives for persistent toxic substances within a finite timeframe. The technological inflexibility of these substances is a tough obstacle to a chemical sunset, because a chemical sunset seeks to ultimately stop, within a short period of time, the risky businesses of these substances that are highly entrenched into our society. In wrestling with this obstacle, the intelligent precautionary “polluter pays” principle integrates three policy tools: a “precautionary `polluter pays' principle,” “intelligent trial and error,” and democratic “regulatory negotiation.” It is designed to promote technological pluralism and strong democracy, as well as to create either trust or mutual adjustment among relevant groups.