More than 10 million pounds of glyphosate, the active ingredient in the weedkiller Roundup, are applied in California each year, according to government figures.
Now, after a yearlong legal battle, California’s environmental health agency has announced that it will list it as a known carcinogen.
The move would make the agency the first American regulatory body to do so. Yet the science is not settled, researchers say.
Two years ago, the cancer research arm of the World Health Organization deemed glyphosate a probable carcinogen. But other regulators have played down concerns of a cancer risk, including the U.S. Environmental Protection Agency which has said glyphosate poses “low toxicity for humans.”
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