Less than a month ago, Houston City Council members responded to an avalanche of complaints about explosions and sickening smells coming from a CES Environmental Services Inc. waste treatment plant in southeast Houston and decided to sue the company under nuisance laws in an attempt to remove the facility. Since then, more than 30 residents of the Griggs Terrace subdivision, which is adjacent to the plant, have filed a class-action lawsuit in Harris County District Court agains