Household cleaning products may contain toxic substances linked to health problems such as asthma, allergic reactions, and cancer, according to a new report by the Environmental Working Group.

The environmental group rated more than 2,000 household cleaners — from laundry soaps and stain removers to bathroom cleaners and floor care products. Products are graded A to F based on the safety of the ingredients and how well the maker discloses those ingredients.

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