Coal from mass extinction era linked to lung cancer mystery

The volcanic eruptions thought responsible for Earth's largest mass extinction - which killed more than 70 percent of plants and animals 250 million years ago - is still taking lives today. That's the conclusion of a new study showing, for the first time, that the high silica content of coal in one region of China may be interacting with volatile substances in the coal to cause unusually high rates of lung cancer. The study, which helps solve this cancer mystery, appears in ACS' Environmental Science & Technology.

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