WASHINGTON, D.C. ? After a decadelong review, the Environmental Protection Agency has decided to allow continued use of 31 popular but controversial agricultural pesticides, concluding cumulative exposure does not pose a health risk.

Although the potential danger of the chemicals, known as organophosphates, has been assessed individually over the years – and in some cases their uses curtailed – this was the first time the EPA examined the chemicals’ risk as a group.

They are used extensively in agriculture to control pests on fruits, vegetables and other crops. They have been targeted by environmentalists who argue they pose a health risk, especially to children. They have been linked to cancer as well as neurological and fertility problems.

Two of the organophosphates – diazonin and chlorpyrifos, which once were widely used to control ants and fleas – have been banned for residential use.

Seventeen organophosphates have been taken off the market during the 10-year review period. But diazonin and chlorpyrifos as well as 29 others still may be used in agriculture, the EPA said.