James Huff, an associate director at the National Institute for Environmental Health Sciences, a division of the N.

NEWYORKER: Covert Operations

All three were funded by grants from the Environmental Protection Agency and the National Institute of Environmental Health Sciences, among other sources.

CNN: Pesticide exposure in womb may hurt your child's IQ

According to the National Institute of Environmental Health Sciences, roaches "are common even in the cleanest of crowded urban areas and older dwellings" and are found in all types of neighborhoods.

CNN: Greyhound bus ride turned into roach-fest, passengers say