Austria is set to become the first EU country to completely ban weedkiller glyphosate, originally developed by Monsanto and marketed under the name Roundup. The ban could clash with EU law.

Lawmakers in Austria’s lower house of parliament voted to ban all uses of controversial herbicide glyphosate on Tuesday, as the substance faces a slew of lawsuits in the US for potentially causing cancer.

“The scientific evidence of the plant poison’s carcinogenic effect is increasing,” the assembly’s top social democrat, Pamela Rendi-Wagner, said in a statement.

“It is our responsibility to ban this poison from our environment,” she added.

Glyphosate was originally developed by chemical giant Monsanto, a US company that became a subsidiary of Germany’s Bayer last year. The herbicide first appeared on the market under the name of Roundup in 1974. The patent for it has since expired and various companies now produce glyphosate-based weedkillers under different names.