This page discusses how human activities emit air pollutants like PM2.5, which are linked to health problems such as asthma and lung cancer. The EPA suggests maintaining PM2.5 levels under 15 µg/m3 fo...This page discusses how human activities emit air pollutants like PM2.5, which are linked to health problems such as asthma and lung cancer. The EPA suggests maintaining PM2.5 levels under 15 µg/m3 for better health outcomes. It also highlights other pollutants, including sulfur dioxide and carbon monoxide, that contribute to photochemical smog, causing eye irritation. Catalytic converters in vehicles help reduce these emissions, thereby improving air quality.
