(ultra)FIJNSTOF de gevaarlijkste PM2,5 in houtrook

minasota

BRON

Fine particle pollution

Fine particles (defined as particles less than 2.5 microns in diameter, noted as PM2.5) are a complex mixture of extremely small particles and liquid droplets that are created during combustion when coal, gasoline, diesel, wood and other fuels are burned, and are also created in the air by chemical reactions among other pollutants.

Gasoline and diesel combustion in cars, trucks, buses, tractor trailers, and construction equipment, known as mobile sources, contribute a third to half of PM2.5 concentrations in highly populated urban areas. Find out about the health effects of fine particles..

The amount of fine particle pollution in the air varies by time of year and location and is affected by changes in weather such as temperature, humidity, and wind. Increases in fine particle pollution can be caused by dirty air being blown into Minnesota from other states or local pollution emissions being trapped in the area due to stagnant weather conditions.

Scale of particles

fine-particle-relative sizes diagram

How particles form

how-particles-form-650-a

Federal standards

Fine particles are regulated on an annual and daily basis to guard against chronic and acute health effects linked to fine particle exposure. A monitoring site meets the annual fine particle standard if the 3-year average of the annual average fine particle concentration is less than 12 μg/m3. The daily standard is met if the 3-year average of the annual 98th percentile daily fine particle concentration is less than 35 μg/m3.

All areas of the state currently meet both the annual and daily fine particle standards.

What can you do to reduce fine particle air pollution?

  • Conserve energy, which reduces the need for utilities to burn coal.
  • Buy clean, renewable power.
  • Drive less.
  • Don’t idle your engine.
  • Use alternative means of transportation.

During air quality alerts

  • Postpone or reduce vehicle trips.
  • Don’t burn wood.
  • Postpone using gasoline-powered equipment, like lawn mowers.
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