Ozone

Learn about traffic-related air pollutants like particulate matter, nitrogen oxides, carbon monoxide, and VOCs, plus their health impacts and reduction strategies.

Explore how gasoline, diesel, electric, and human-powered transportation affect air quality. Learn which travel options produce the least air pollution and what it means for healthier cities.

Learn how particulate matter, ozone, nitrogen oxides, black carbon, and carbon monoxide cross borders, impact health and climate, and why monitoring transboundary air pollution matters.

Electric Vehicles eliminate tailpipe air pollution but still produce some emissions from wear, charging, and manufacturing. Cleaner energy and battery recycling help reduce EV air pollution.

Air pollution has changed over time, with sources evolving from wood burning and smelting to widespread fossil fuel use, industrial emissions, and intensified wildfires.

Wildfire smoke contains a complex mix of harmful pollutants, such as ozone precursors, carbon monoxide, and particulate matter like PM2.5 and black carbon. These pollutants can affect health and travel far from the fire source.

LA battles air pollution driven by geography, traffic, and summer heat. Learn about its smog history, current challenges, and efforts to protect public health.

Air pollutants influence ecosystems, the water cycle, and global temperatures by driving acid rain, ocean acidification, ozone depletion, the greenhouse effect, and changes in Earth's albedo.

Smog includes two main types: sulfurous smog, linked to coal burning and sulfur dioxide, and photochemical smog, formed by sunlight-driven reactions between nitrogen oxides and VOCs, producing ozone and particulate matter.

Natural sources such as wildfires, volcanoes, and sandstorms emit air pollutants like particulate matter, nitrogen oxides, and volatile organic compounds, sometimes affecting human health and the climate.