Based on public pronouncements, one of the key metrics in determining US Policy at present is whether the policy under review will keep America (and Americans) safe. If we want to keep Americans safe, then fund the EPA and support/strengthen their policies to defeat air pollution. Perhaps when we can breathe safer, we will breathe easier.
During the Rio de Janeiro Olympics this summer, barriers will be installed across the fourteen dying rivers that empty into Guanabara Bay. The barriers are to keep garbage from floating into the paths of Olympic sailors. In the bay itself, a fleet of boats will patrol to keep debris from causing any mishaps and potentially costing someone a medal.