On Our Radar: Oil Sheen in the Gulf Some state and local officials along the Gulf Coast say that a newly discovered oil sheen linked to the 2010 BP spill demonstrate that the full impact of the accident is not yet clear. Federal officials and BP are still negotiating to determine the company's liability for the disaster. The Wall Street Journal Nearly 100 non-native freshwater species have invaded the River Thames, making it one of the world's most highly invaded freshwater systems, a new study suggests. The implications could be negative for the waterway's biodiversity. The Italian authorities take control of a plant belonging to the world's fifth-largest cement maker amid allegations of illegal toxic emissions. An evolving map (dubbed a "food compass") from the Department of Agriculture labels places across the country where people can seek out local food or get information about sources.