There is a problem with the environment which does not depend on conflicting opinions based on computer driven models as is the case with global warming. It is air pollution, clean air or whatever you call the ghostly daytime scenes in cities like Beijing, Delhi and now London.
The World Health Organization estimates that seven million people died from air pollution in 2012 which was about one in eight of all deaths in the world that year. It confirms that air pollution is the world’s largest environmental health risk. Most of the deaths are due to heart disease, stroke, lung cancer and acute respiratory infections.
London’s air pollution today is similar to that of the 1950s which was due to coal burning power stations and coal used to heat homes. Today a main reason is the use of wood burning stoves for heating. The pollution is visible and a health hazard.
Environment Canada publishes an Air Quality Health Index and on most days there are no problems similar to those found in the cities of some other countries. As a global issue it is large and visible where it occurs.