Pollutant emissions from transport vehicles, smoke from industrial activity and building heating equipment are major contributors to rising air pollution. The most significant cause of industrial air pollution is energy production. Wind can freshen the air, but after a while it does not have enough power to deal with the accumulated dust and soot, so the CO2, NO2 and toxic metals released into the air become smog, destroying wildlife. Leave the emission of black clouds to volcanoes, known to nature for few 100 million years.
