US must re-examine risks of glyphosate, key Roundup weedkiller ingredient

Appeals says EPA did not adequately consider whether glyphosate causes cancer and threatens endangered species

The US Environmental Protection Agency has been ordered to take a fresh look at whether glyphosate, the active ingredient in Bayer's Roundup weedkiller, poses unreasonable risks to humans and the environment.

In a 3-0 decision on Friday, the ninth US circuit court of appeals agreed with several environmental, farmworker and food-safety advocacy groups that the EPA did not adequately consider whether glyphosate causes cancer and threatens endangered species.