adcelannotate = {"mobilepaywallcategory" : "MOBILE_PREM-LOCAL","nativepaywallcategory" : "NATIVE_PREM-LOCAL"};A number of environmental groups are suing the U.S. Environmental Protection Agency, saying the government has failed to adequately regulate how companies dispose of waste created by oil and gas drilling. The organizations, including some in Ohio, want the EPA to revisit regulations over injection wells that pump hundreds of millions of gallons of waste from drilling and fracking each year.