London is not the only city plagued by air pollution.
We also have New Delhi, Beiging, and Los Angeles.
For centuries, climate aggregated and aggravated the effects of air pollution.
Today, air pollution is creating climate change.
Burning fossil fuels, incinerating waste, leaving waste to decompose,
concentrating animals raised for food,
overapplying pesticides and fungicides on crops,
leaving farms and ranges susceptible to erosion by water and wind,
allowing nuclear tests and failing to prevent nuclear accidents,
choosing construction materials and solvents that emit toxins,
and overusing cosmetic products
all contribute to air pollution.
Noise pollution, light pollution, and unwanted commercial advertizing
combine with air pollution to foul the commons.
See also in The book of science:
Readings on wikipedia: