Researchers say in a new study that wildfire smoke accounted for up to half of all small particle air pollution in parts of the western U.S. in recent years.
Flooding has caused hundreds of billions of dollars in damage in the U.S. over the past three decades. Researchers found that 36 percent of the costs of flooding in the U.S. from 1988 to 2017 were a result of intensifying precipitation, consistent with predictions of global warming.
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