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In page Global catastrophic risk:
"An October 2017 report published in The Lancet stated that toxic air, water, soils, and workplaces were collectively responsible for 9 million deaths worldwide in 2015, particularly from air pollution which was linked to deaths by increasing susceptibility to non-infectious diseases, such as heart disease, stroke, and lung cancer.[4] The report warned that the pollution crisis was exceeding "the envelope on the amount of pollution the Earth can carry" and “threatens the continuing survival of human societies”.[4]
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