According to media reports, the first nationwide large-scale estimation of trees in the elimination of air pollution data, the US Forest Service and partners estimated that trees can save more than 850 lives a year, can prevent 670,000 cases of acute respiratory diseases.
Although the index of tree air pollution elimination is only equivalent to less than 1% of the average air quality improvement, this improvement is substantially improved. Researchers spend nearly $7 billion a year on the impact of reduced air pollution on human health, a study recently published in the journal Environmental Pollution.
The study was conducted in collaboration with Dave Nowak and Eric Greenfield of the North American Research Station of the US Forest Service and Nakamoto Chong Pinglin and Ellison Bodin of the David Institute. Unique because it is directly linked to the elimination of air pollution and the impact on improving human health and related health values. Scientists have found that the degree of air pollution elimination is much higher in rural areas than in urban areas, but the impact on human health is better than that in rural areas.
“More than 80% of Americans live in urban areas, and this study emphasizes that trees in urban areas across the country are truly essential.â€, Mike T. Raines, Forest Service North Research Station and Forest Products The laboratory director said. The development of forest services research information and tools has facilitated community assessments of urban areas, towns and communities and the development of 138 million acres of trees and forests.
The US Environmental Protection Agency has developed air quality standards by considering four air pollutants: nitrogen dioxide, ozone, sulfur dioxide, and respirable particulate matter have an aerodynamic diameter of less than 2.5 microns. Air pollution affects human health including the lungs, heart, blood vessels and nervous system. In the United States, human mortality due to air pollution is high.
The benefits of trees vary with the country's tree coverage. Tree coverage in the United States is estimated at 34.2%, but the change is reflected in the 2.6% coverage of North Dakota in the United States to 88.9% coverage in New Hampshire.
“In terms of impact on human health, the impact of trees in urban areas is greater than that in nearby rural areas, and it is more important for people,†Novak said. “We found that in general, trees The higher the coverage, the better the elimination of air pollution, the greater the population density in the region, but the greater the value of human health benefits."
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