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  2. Air pollution - Wikipedia

    en.wikipedia.org/wiki/Air_pollution

    Air pollution is the presence of substances in the atmosphere that are harmful to humans and other living beings, or cause damage to the environment. Air pollution can be chemical, physical or biological. [ 1 ]

  3. Environmental impact of aviation - Wikipedia

    en.wikipedia.org/wiki/Environmental_impact_of...

    The Environmental Protection Agency estimated this released 34,000 tons of lead into the atmosphere between 1970 and 2007. [66] The Federal Aviation Administration recognizes inhaled or ingested lead leads to adverse effects on the nervous system, red blood cells, and cardiovascular and immune systems. Lead exposure in infants and young ...

  4. Smog - Wikipedia

    en.wikipedia.org/wiki/Smog

    Secondary pollutants, such as ozone, are formed when primary pollutants undergo chemical reactions in the atmosphere. Photochemical smog, as found for example in Los Angeles, is a type of air pollution derived from vehicular emission from internal combustion engines and industrial fumes.

  5. Particulate pollution - Wikipedia

    en.wikipedia.org/wiki/Particulate_pollution

    Atmospheric particulate matter, also known as particulate matter, or PM, describes solids and/or liquid particles suspended in a gas, most commonly the Earth's atmosphere. [1] Particles in the atmosphere can be divided into two types, depending on the way they are emitted. Primary particles, such as mineral dust, are emitted into the atmosphere ...

  6. Atmospheric methane - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_methane

    Methane (CH 4) concentrations in the atmosphere measured by the Advanced Global Atmospheric Gases Experiment (AGAGE) in the lower atmosphere (troposphere) at stations around the world. Values are given as pollution free monthly mean mole fractions in parts-per-billion. [1] Atmospheric methane is the methane present in Earth's atmosphere. [2]

  7. Here's What Wildfire Smoke Does To Your Body And Why It's So ...

    www.aol.com/news/heres-wildfire-smoke-does-body...

    Small particles of smoke can stay in the air and move through the atmosphere for weeks depending on how long the fires last. Pets can also be affected by unhealthy air and if possible, should be ...

  8. Terrifying video shows why snow squalls are so dangerous - AOL

    www.aol.com/weather/snow-squalls-why-dangerous...

    All that is needed is enough moisture in the low levels of the atmosphere to initiate cloud formation and very cold air aloft, according to Sosnowski. ... you can possibly avoid dangerous driving ...

  9. NOx - Wikipedia

    en.wikipedia.org/wiki/NOx

    If the volatiles evolve into a reducing atmosphere, the nitrogen evolved can readily be made to form nitrogen gas, rather than NO x. The second pathway involves the combustion of nitrogen contained in the char matrix during the combustion of the char portion of the fuels.