Particulate pollution

[4] Some particulates occur naturally, originating from volcanoes, dust storms, forest and grassland fires, living vegetation and sea spray.

[11] Microplastics are an emerging source of atmospheric pollution, particularly fine plastic fibers that are light enough to be carried by the wind.

[14] Domestic combustion pollution is mainly composed of burning fuel including wood, gas, and charcoal in activities of heating, cooking, agriculture, and wildfires.

[17][18] In some towns and cities in New South Wales wood smoke may be responsible for 60% of fine particle air pollution in the winter.

[20] The particulate pollutant is often in microscopic size that enables it to infiltrate into interior space even if windows and doors are closed.

[citation needed] The main component of woodsmoke, black carbon significantly appears in the indoor environment compared to other ambient pollutants.

[citation needed] The regular dusk mask also can help little with particulate pollutants since they are designed to filter out larger particles.

[21] Living under high concentrations of pollutants can lead to headaches, fatigue, lung disease, asthma, and throat and eye irritation.

[2] Through interactions with water, many marine aerosols help to scatter light, and aid in cloud condensation and ice nuclei (IN); thus, affecting the atmospheric radiation budget.

[25] In contrast, operational debris describes the matter associated with the propulsion of a larger entity into space, which may include upper rocket stages and ejected nose cones.

[25] Fragmentation debris refers to any object in space that has become dissociated from a larger entity by means of explosion, collision or deterioration.

[25] In response to research that concluded that impacts from Earth orbital debris could lead to greater hazards to spacecraft than the natural meteoroid environment, NASA began the orbital debris program in 1979, initiated by the Space Sciences branch at Johnson Space Center (JSC).

[27] Particulate pollution is observed around the globe in varying sizes and compositions and is the focus of many epidemiological studies.

[29] Particles 2.5 μm or smaller in size are especially notable as they can be inhaled into the lower respiratory system, and with enough exposure, absorbed into the bloodstream.

In a study by Han et al, the effects of PM<2.5 micrometers on life history traits and oxidative stress were observed in Tigriopus japonicus.