Baltimore has a huge asthma problem, disproportionately affecting those with low incomes. No wonder. These people are the ones most likely to live near coal-fired power plants, streets congested with toxin-emitting vehicles and heavy industry. It's time we stop treating the air we breathe as a dump for carbon pollution. When we burn coal, oil and gas, noxious gases are released, like nitrous oxides, sulfur dioxide and mercury as well as particulate matter. These cause asthma and other diseases.