Air pollution is the presence of substances in the air that are harmful to humans, other living beings or the environment. Pollutants can be gases, like ozone or nitrogen oxides, or small …

Jul 24, 2025 · Air pollution is contamination of the indoor or outdoor environment by any chemical, physical or biological agent that modifies the natural characteristics of the atmosphere. …

Dec 30, 2025 · Air pollution, release into the atmosphere of various gases, finely divided solids, or finely dispersed liquid aerosols at rates that exceed the natural capacity of the environment to …

Oct 31, 2023 · The effects of air pollution wreck havoc on human health and our planet as a whole. Learn about what causes air pollution and how to help reduce the effects.

Sep 10, 2025 · Air pollution is a familiar environmental health hazard. We know what we’re looking at when brown haze settles over a city, exhaust billows across a busy highway, or a …

Sep 25, 2025 · Despite the dramatic progress to date, air pollution continues to threaten Americans’ health and welfare. The main obstacles are climate change, conventional air …

Outdoor air quality has improved since the 1990s, but many challenges remain in protecting Americans from air quality problems. The EPA regulates six pollutants as “criteria” air pollutants.

Sep 5, 2025 · Ahead of the International Day of Clean Air, here’s a look at what causes air pollution, what it does to people and how the world can rein it in.

Air pollution refers to the presence of harmful substances in the atmosphere that can adversely affect human health, ecosystems, and the planet as a whole.

Air pollution consists of chemicals or particles in the air that can harm the health of humans, animals and plants. It can even damage buildings.