Light and air pollution often linger - along with the noise - long after the oil and gas wells have been sucked dry.
Scientists report worrisome changes to liver and kidney genes in rats, adding to evidence that exposure to the herbicide may be toxic.
Nancy A. Youssef is a McClatchy reporter. Her email is email@example.com; and her Twitter is: @nancyayoussef
Mohamed Fadel Fahmy and Amina Ismail are McClatchy special correspondents.