There should be limits but other than international air pollution standards that deal with real pollutants, it will be a long row to hoe. (judithcurry.com)
Late in October, California Governor Jerry Brown threatened to sue the administration of President Donald Trump for implementation of environmental policies focused more on real pollutants (e.g., heavy metals) and less on contrived ones (e.g., carbon dioxide from fossil fuel combustion. (legalinsurrection.com)
Real pollutants from fossil fuel combustion, such as oxides of sulfur, nitrogen and fly ash, are rightly controlled, and by cost - effective technology. (clexit.net)