Plaintiffs, residents, and owners of lands and property along the Mississippi Gulf costs sued in a class action suit against all major energy and chemical companies. Plaintiffs claim that defendants' operation of energy, fossil fuels, and chemical industries caused the emission of greenhouse gases that contributed to global warming, which changed weather patterns and caused Hurricane Katrina to be stronger than it would have been otherwise, thereby causing large loss of property. On theories of nuisance, trespass, and negligence, the plaintiffs contend that the firms injured them and have been enriched in the process of emitting greenhouse gases, so they demand compensatory and punitive damages. The district court dismissed the suit. Plaintiffs appealed; do you think they have a case? [Comer v. Murphy Oil, 585 F.3d 855, 5th Cir. (2009)]