Environmental campaign group Greenpeace has launched a campaign calling on denim giant Levi Strauss & Co to commit to eliminating certain chemical substances from its garments and manufacturing processes.

Environmental campaign group Greenpeace has launched a campaign calling on denim giant Levi Strauss & Co to commit to eliminating certain chemical substances from its garments and manufacturing processes.

Last month, Greenpeace International published a report claiming that 20 leading fashion brands were selling clothing contaminated with chemicals and hormone-disrupting or cancer-causing properties when released into the environment.

It says its investigations have revealed hazardous chemicals in a number of Levi's clothing items, as well as links between the brand and suppliers in Mexico that are releasing hazardous chemicals into local water supplies.

Since the report was released, Esprit and Spanish retail giant Inditex have said they will cut hazardous chemicals from their clothing by 2020.

Other companies including Adidas, C&A, H&M, Li Ning, Nike, Puma, M&S and H&M have already joined forces in what Greenpeace calls the "Detox challenge".

But the organisation claims Levi Strauss, the world's largest jeans manufacturer, has not announced any measures to improve its operations. It says the company's chemical policy is focused on managing hazardous chemicals, not eliminating them.