Final answer:
Environmentalists may not favor command-and-control policies as a way to reduce pollution due to their inflexibility and lack of incentives for further pollution reduction by firms.
Step-by-step explanation:
Environmentalists may not favor command-and-control policies as a way to reduce pollution because they have some drawbacks. Firstly, command-and-control regulation is inflexible as it applies the same standards and pollution-control technology to all polluters, without considering their individual circumstances. This can be inefficient and prevent firms from finding innovative ways to reduce pollution. Additionally, once firms meet the minimum requirements of command-and-control regulation, they have no incentives to further reduce pollution.