Pima County said Tuesday it will spend $1 million over the next four years to plan ways to reduce harmful emissions.

The Environmental Protection Agency awarded a Climate Pollution Reduction Grant to the 67 most populous Metropolitan Statistical Areas to develop methods to reduce greenhouse gas emissions. Pima County plans to team up with Tucson and other jurisdictions to start a “stakeholder engagement process” to work on plans to reduce harmful air pollution, especially in “low-income and disadvantaged communities,” according to a memo from County Administrator Jan Lesher.