The coal energy company, Great Power, releases carbon emissions into the atmosphere of the City of Atlanta. Great Power however does not do anything to bear the external costs associated with the health and ecological problems it creates for residents of the City of Atlanta. In other words, Great Power believes that residents of the City of Atlanta do not know about the problems and then leaves residents to pay for the health and ecological problems they (residents) may suffer from carbon emissions from the company (Great Power).

Suppose that you are a concerned resident working with the following marginal benefits and costs for coal energy, where Q is thousands of pounds of carbon emissions and P is price per pound:

MPB (Marginal Private Benefit) = 90 - 0.30Q.

MPC (Marginal Private Cost) = 30 + 0.20Q.

MEB (Marginal External Benefit) = 0.00

MEC (Marginal External Cost) = 0.10Q.

Suppose Power for Health Earth owned the rights to pollute the atmosphere of the City of Atlanta, and it is negotiating with concerned residents willing to pay the company (Great Power) to produce less coal energy.

Clearly explain the price range associated the 11th unit of coal energy.