Portland, OR — Signs of Heavy Aerosol Nitrogen Deposition Contamination

by dtlange

Much of the landscape of Portland, Oregon is known to be burdened by dense amounts of nitrogen oxides, NO2 or NOX — all of which have negative effects on human, and plant, health.

The burning of fossil fuels are the main source of this aerosol nitrogen pollution. NOX is also a prime indicator of other “combustion-related pollutants”.

Since fossil fuel pollution also destroys our climate when it fills the global atmosphere, it also damages life in local and regional environments.

– For a fairly recent news article relating to a scientific study on this issue see: “PSU study shows Portland’s urban forest reduces air pollution but also finds hazards

Nitrogen is also a strong plant fertilizer which promotes growth. These photos show an incongruous growth of moss and lichen on exposed urban surfaces.

– Below is a small sample of photos which illustrate the degree of NOX pollution in Portland, OR. (More to come at a later date.)

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PHOTO: North Portland, OR. Street Scene: Color Scheme Blue, Yellow, and Green for Heavy Nitrogen Deposition Contamination. – David Lange Nov 20, 2014

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Dense epiphytic growth nurtured by aerosol nitrogen contamination and deposition on a tree branch and twig in North Portland, OR. Nov. 5, 2014. – DT Lange

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Signs of Heavy Aerosol Nitrogen Deposition Contamination, North Portland, OR. Nov. 24, 2014. – DT Lange

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Signs of Heavy Aerosol Nitrogen Deposition Contamination, North Portland, OR. Nov. 24, 2014. – DT Lange

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