which they collected health data from residents within 2.5 kilometers of Cancer Alley. The survey focused on what symptoms those with lung cancer were having. One-third of the participants responded by saying that they regularly have a hard time breathing and frequently wheeze. More than 40% of participants experience frequent coughing and tend to have a sore throat. Around 30% of participants also reported feeling fatigued. Cancer clusters A cancer cluster can be defined as "the occurrence of a greater than expected number of cancer cases among a group of people in a defined geographic area over a specific time period." A cancer cluster can also be suspected when multiple family members, friends, neighbors, and coworkers become diagnosed with the same type of cancer. There has been some controversy in whether or not Cancer Alley can truly be considered a cancer cluster. Since cancer is a somewhat common disease, cases of cancer can appear to cluster even if there is no connection among them, causing cancer clusters to arise by chance. A study done on cancer clusters in the United States revealed that extensive efforts to find causes of community cancer clusters have not been successful in the past 20 years. This study did look at all 50 states and the District of Columbia and investigated cancer types, exposure, confirmation of clusters, and conclusions about a link between cancers of concern and environmental exposures. Government action The EPA’s National Air Toxic Assessment looked at toxic emissions around the nation in 2011 and released the findings in 2015. The study found that the air in LaPlace, Louisiana, which is an area in Cancer Alley, had a higher-than-expected level of chloroprene. This subsequently caused the EPA to begin working closely with the owner of the neoprene plant in the area, Denka Performance Elastomer, and the Louisiana Department of Environmental Quality to lower chloroprene emissions. The overall goal was to lower chloroprene emissions by 85%. The state of Louisiana says that Denka has reached the goal of lowering emissions by 85%, but some residents remain skeptical. Many residents believe that instead of reducing emissions by a percentage, the emissions should be 0.2 micrograms per cubic meter of air, which is what is considered a safe level by the EPA. Mossville, Louisiana Mossville is a small and predominantly African American community located on the outskirts of Lake Charles in Calcasieu Parish, Louisiana. It was