Research from the University of Chicago suggests global life expectancy is cut by two years as a result of particulate matter air pollution. The study is called the Air Quality Life Index, which monitors air quality and then assesses how it could impact life expectancy. According to the report, man-made activities cause the most particulate pollution, despite the fumes given off from natural sources like wildfires. Burning fossil fuels for energy was identified as the main culprit of pollution around the world.