One of the most common weed killers in the world, atrazine, can chemically castrate male frogs, turning them into females that lay eggs, say U.S. researchers.

A Quebec environmental group wants the province to ban atrazine — an herbicide that's already been outlawed in the European Union and is listed by Health Canada as possibly carcinogenic.

Brazilian labor prosecutors have requested a court order to ban the use of atrazine, which is present in 5% of pesticides sold in the country, the prosecutors said on Thursday.

Atrazine is a commonly used herbicide in the U.S. The Environmental Protection Agency regulates how much is allowed in drinking water and evaluates potential ecological and human health risks.