As city mayor, you're meeting with members of the city council to discuss proactive ways to improve your community's future air environment. One member suggests planting trees, which will transform carbon dioxide into oxygen. How would you provide incentives to residents to plant more trees on their private properties?

As city mayor, you're meeting with members of the city council to discuss proactive ways to improve your community's future air environment. One member suggests planting trees, which will transform carbon dioxide into oxygen. How would you provide incentives to residents to plant more trees on their private properties?

Set a quota above the market quantity of trees.

Charge a tax equal to the marginal social cost of pollution.

Provide a subsidy equal to the marginal external benefit of each tree.

Require a meeting where all city homeowners reach a solution via private bargaining.