According to The U.S. Environmental Protection Agency (EPA), it is unlikely to approve new or expanded uses of certain pesticides while it evaluates the risks they may pose to honey bees.

The so-called neonicotinoid pesticides are routinely used in agriculture and applied to plants and trees in gardens and parks. But their widespread use has come under scrutiny in recent years after a drop in the number of honey bees and other pollinating insects, which play key roles in food production.

The decline is attributed to factors including pesticide and herbicide use, habitat loss and disease, according to the U.S. Fish and Wildlife Service.

A unanimous vote by the Portland City Commission came despite protests from farmers, nursery owners and others who claimed the insecticide was crucial in combating pests that destroy crops and other plants. Portland is among at least eight municipalities that have banned the chemicals, according to Laura Zuckerman of Reuters.

An assessment is being conducted by the EPA of six types of neonicotinoids and their impact on honey bees.

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