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  1. en.wikipedia.org › wiki › ParticulatesParticulates - Wikipedia

    Vor 5 Tagen · Particulates or atmospheric particulate matter (see below for other names) are microscopic particles of solid or liquid matter suspended in the air. The term aerosol commonly refers to the particulate/air mixture, as opposed to the particulate matter alone. Sources of particulate matter can be natural or anthropogenic.

  2. en.wikipedia.org › wiki › Carbon_dioxide_in_Earth&Carbon dioxide in Earth's atmosphere - Wikipedia

    Vor 2 Tagen · It is one of several greenhouse gases in the atmosphere of Earth. The current global average concentration of carbon dioxide (CO 2) in the atmosphere is 421 ppm as of May 2022 (0.04%). [1] . This is an increase of 50% since the start of the Industrial Revolution, up from 280 ppm during the 10,000 years prior to the mid-18th century.

  3. www.britannica.com › science › atmosphereAtmosphere | Definition, Layers, & Facts | Britannica

    12. Apr. 2024 · Atmosphere, the gas and aerosol envelope that extends from the ocean, land, and ice-covered surface of a planet outward into space. The density of the atmosphere decreases outward, because the planet’s gravitational attraction, which pulls the gases and aerosols inward, is greatest close to the surface.

    • Roger A. Pielke
    • Atmosphere (unit) wikipedia1
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  4. en.wikipedia.org › wiki › Air_pollutionAir pollution - Wikipedia

    Vor 2 Tagen · Air pollution is the contamination of air due to the presence of substances called pollutants in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials.

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  6. www.climate.gov › climate-change-atmospheric-carbon-dioxideClimate Change: Atmospheric Carbon Dioxide

    9. Apr. 2024 · Highlights. Each year, human activities release more carbon dioxide into the atmosphere than natural processes can remove, causing the amount of carbon dioxide in the atmosphere to increase. The global average carbon dioxide set a new record high in 2023: 419.3 parts per million.

  7. www.epa.gov › ghgemissions › overview-greenhouse-gasesOverview of Greenhouse Gases | US EPA

    11. Apr. 2024 · Concentration, or abundance, is the amount of a particular gas in the air. Larger emissions of greenhouse gases lead to higher concentrations in the atmosphere. Greenhouse gas concentrations are measured in parts per million, parts per billion, and even parts per trillion.

  8. www.britannica.com › science › carbon-footprintCarbon footprint | Definition, Examples, Calculation, Effects, &...

    Vor einem Tag · Carbon footprint, amount of carbon dioxide emissions associated with all the activities of a person or other entity. It includes direct emissions, such as those that result from fossil fuel combustion, as well as emissions required to produce the electricity associated with goods and services consumed.