Final answer:
Marketable permits are a tool that can be used in market-oriented environmental policies. They work best when a few dozen or a few hundred parties are highly interested in trading. Tradable permits allow firms to emit a certain amount of pollution, and firms with more permits can sell them to other firms.
Step-by-step explanation:
Marketable permits are a tool that can be used in market-oriented environmental policies. They work best when a few dozen or a few hundred parties are highly interested in trading, such as oil refineries or electrical utilities.
Tradable permits allow firms to emit a certain amount of pollution, and firms with more permits can sell them to other firms. This system allows firms with lower costs of abatement to reduce pollution the most, while firms with higher costs can buy permits and abate less.