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  1. www.britannica.com › science › air-pollutionAir pollution | Effects, Causes, Definition, & Facts | Britannica

    Hace 3 días · Clean, dry air consists primarily of nitrogen and oxygen —78 percent and 21 percent respectively, by volume. The remaining 1 percent is a mixture of other gases, mostly argon (0.9 percent), along with trace (very small) amounts of carbon dioxide, methane, hydrogen, helium, and more.

    • Air Pollution

      Air pollution - Health, Climate, Environment: Because some...

    • Ozone

      Ozone is 1.5 times as dense as oxygen; at −112 °C (−170 °F)...

  2. en.wikipedia.org › wiki › Air_pollutionAir pollution - Wikipedia

    Hace 3 días · Growing evidence that air pollution—even when experienced at very low levels—hurts human health, led the WHO to revise its guideline (from 10 μg/m 3 to 5 μg/m 3) for what it considers a safe level of exposure of particulate pollution, bringing most of the world—97.3 percent of the global population—into the unsafe zone.

  3. www.trvst.world › environment › air-pollution-facts-statistics25 Air Pollution Facts & Statistics (2024)

    17 de may. de 2024 · Statistics On The Effects Of Air Pollution. The air on Earth comprises roughly 78% nitrogen, 21% oxygen, and 1% argon, with trace elements, including potent greenhouse gases, making up the rest.

  4. www.eea.europa.eu › en › topicsAir pollution | European Environment Agency's home page

    27 de may. de 2024 · Exposure to fine particulate matter and nitrogen dioxide levels above the World Health Organization recommendations cause an estimated 253,000 and 52,000 premature deaths, respectively, in 2021. These pollutants are linked to asthma, heart disease and stroke. Air pollution also causes morbidity.

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  6. aqicn.org › statisticsWorld Air Pollution Statistics - aqicn.org

    Hace 5 días · Air Pollution Level: Health Implications: Cautionary Statement (for PM2.5) 0 - 50: Good: Air quality is considered satisfactory, and air pollution poses little or no risk: None: 51 -100: Moderate

  7. ourworldindata.org › grapher › share-above-who-pollution-guidelinesShare of the population exposed to air pollution levels above WHO...

    20 de may. de 2024 · Percent of population exposed to ambient concentrations of PM2.5 that exceed the WHO guideline value is defined as the portion of a country’s population living in places where mean annual concentrations of PM2.5 are greater than 10 micrograms per cubic meter, the guideline value recommended by the World Health Organization as the lower end of th...

  8. www.epa.gov › greenvehicles › fast-facts-transportation-greenhouse-gas-emissionsFast Facts on Transportation Greenhouse Gas Emissions

    14 de may. de 2024 · Transportation - 28% Electricity - 25% Industry - 23% Agriculture - 10% Commercial - 7% Residential - 6% 2022 U.S. Transportation Sector GHG Emissions by Source. Light-Duty Vehicles - 57% Medium- and Heavy-Duty Trucks - 23% Aircraft - 9% Other - 6% Rail - 2% Ships and Boats - 3% Note: Totals may not add to 100% due to rounding.