Researchers say inhalers in the US alone generate annual emissions equivalent to 530,000 cars.
The inhalers people depend on to breathe are also warming the planet, producing annual emissions equivalent to more than half a million cars in the United States alone, researchers have said in a major new study.
Using a national drug database, researchers at the University of California, Los Angeles and Harvard University analysed global warming pollution from three types of inhalers used to treat
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