You have permission to edit this article.Today and for the foreseeable future, all of us face the threat of COVID-19. This disease is particularly hazardous to those with weakened immune systems, and specifically those who struggle with respiratory problems. We who live in southeastern Wisconsin are especially vulnerable, because we are breathing the most polluted air in the state.For many years the American Lung Association has given an "F" to the air quality in Milwaukee, Racine and Kenosha counties. Coal is the dirtiest of the fossil fuels, and Wisconsin's greatest polluter, by far, is...…You have permission to edit this article.Today and for the foreseeable future, all of us face the threat of COVID-19. This disease is particularly hazardous to those with weakened immune systems, and specifically those who struggle with respiratory problems. We who live in southeastern Wisconsin are especially vulnerable, because we are breathing the most polluted air in the state.For many years the American Lung Association has given an "F" to the air quality in Milwaukee, Racine and Kenosha counties. Coal is the dirtiest of the fossil fuels, and Wisconsin's greatest polluter, by far, is...WW…