It is no surprise that still today many major cities around the world have horrific air quality.
History tends to repeat itself in this area, as every generation has a different heat and energy source.
Coal was the culprit in the 19th century. But when it became so deadly apparent that coal exhaust was literally responsible for poor health and untold numbers of premature deaths the British government finally forced its citizens and businesses to switch to cleaner fuel alternatives.
As always, there was lots of kicking and screaming and doomsday proclamations, and dire economic forecast, and threats of bankruptcies. But somehow civilization not only survived the transition but even flourished with a better quality of life.
Don’t be fooled, there is absolutely NOTHING clean about coal as this video dramatically demonstrates.