"Under Agreement with the Justice Department and Environmental Protection Agency, ExxonMobil to Reduce Harmful Air Pollution at Eight U.S. Chemical Plants," 31 October 2017

The Department of Justice, U.S. Environmental Protection Agency (EPA), and Louisiana Department of Environmental Quality (LDEQ) announced a settlement...with Exxon Mobil Corp. and ExxonMobil Oil Corp., that will eliminate thousands of tons of harmful air pollution from eight of Exxon’s petrochemical manufacturing facilities in Texas and Louisiana. The settlement resolves allegations that ExxonMobil violated the Clean Air Act by failing to properly operate and monitor industrial flares at their petrochemical facilities, which resulted in excess emissions of harmful air pollution. 

ExxonMobil will spend approximately $300 million to install and operate air pollution control and monitoring technology to reduce harmful air pollution from 26 industrial flares at five ExxonMobil facilities in Texas...and three of the company’s facilities in...Louisiana.

...[T]he pollution controls required by the settlement are estimated to reduce harmful air emissions of volatile organic compounds (VOCs)... [and] toxic air pollutants... [which] can cause significant harm to public health.. [by] exacerbat[ing] diseases such as asthma, and [possibly] increasing susceptibility to respiratory illnesses, such as pneumonia and bronchitis. Chronic exposure to benzene... can cause numerous health impacts, including leukemia and adverse reproductive effects in women.