In some ares like New England white nose syndrome decimated bat populations. Bats are an important part of the ecosystem and something unexpected was noticed. The evidence isn't perfect, but you don't want to increase neurotoxins in the environment.
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Frank also looked at infant mortality in all the counties. In places where the bat populations had crashed, deaths due to accident or homicides stayed the same. But other deaths, such as those caused by disease or birth defects, rose 8%. In counties with healthy bat populations, the numbers didn’t shift one way or another. “My jaw dropped,” Frick says.
Several lines of evidence connect pesticides and other agrochemicals to human health risks. Although government regulators assess the potential dangers of these compounds before approving them—and set safety guidelines for their use—farm workers and bystanders can still get exposed when these compounds drift away from a farm or end up in groundwater. Epidemiological studies have linked certain compounds to developmental problems in infants and children, for example. Insecticides, which are often neurotoxic, are often of particular concern.
The increase in deaths is “huge,” says Tracey Woodruff, an environmental health scientist at the University of California San Francisco. The connection is plausible and concerning, she says. In an earlier study, she found an increase in infant mortality of similar magnitude due to worsening air pollution. But a puzzling fact about the new study is that other aspects of infant health, such as birth weight, did not correlate with the bat declines.
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guns and their hero
06:46 in Current Affairs, General Commentary | Permalink | Comments (0)