The surrounding weeds are killed while the GM plant is engineered to resist the herbicide . EPA has steadily increased the allowable concentration limit of herbicides in food supply . The FDA is currently reviewing a petition to increase that limit from 0.02 parts per billion (ppb) to 0.05 ppm ( ppb ), which would be considered an acceptable level for most crops. Herbicide resistant crops present health risks for consumers that can not be ignored .
EPA has steadily increased the allowable concentration limit of herbicides in food supply . The FDA is currently reviewing a petition to increase that limit from 0.02 parts per billion (ppb) to 0.05 ppm ( ppb ), which would be considered an acceptable level for most crops. Herbicide resistant crops present health risks for consumers that can not be ignored .