Source: McCarthy, N. (January 26, 2015). Air Pollution Levels In Perspective: China And The US [Digital image]. Retrieved September 10, 2020, from https://www.statista.com/chart/3161/air-pollution-levels-in-perspective/
Source: QuintilesIMS. (n.d.). Top 20 therapy areas in the United States in 2016, by number of prescriptions (in millions). In Statista - The Statistics Portal. Retrieved September 22, 2017, from https://www-statista-com.proxy.hvcc.edu:2443/statistics/315467/prescriptions-by-selected-therapy-area-in-the-us/.