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e. 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. [ 1] It is also the contamination of the indoor or outdoor environment either by chemical, physical, or biological ...
The ozone hole was much more seen as a "hot issue" and imminent risk compared to global climate change, [13] as lay people feared a depletion of the ozone layer (ozone shield) risked increasing severe consequences such as skin cancer, cataracts, [23] damage to plants, and reduction of plankton populations in the ocean's photic zone. This was ...
The World Health Organization guidelines were most recently updated in 2021. [ 1] The guidelines offer guidance about these air pollutants: particulate matter (PM), ozone (O 3 ), nitrogen dioxide (NO 2 ), sulfur dioxide (SO 2) and carbon monoxide (CO). [ 2] The WHO first released the air quality guidelines in 1987, then updated them in 1997. [ 2]
The Environmental Protection Agency is delaying plans to tighten air quality standards for ground-level ozone — better known as smog — despite a recommendation by a scientific advisory panel ...
August 2, 2024 at 4:15 PM. An air quality alert was issued by the Texas Commission on Environmental Quality on Friday at 3 p.m. for Saturday. The alert is for Wise, Denton, Collin, Hunt, Parker ...
Air quality targets for particulates, nitrogen dioxide and ozone, [8] set by the Department for Environment, Food and Rural Affairs (DEFRA), are mostly aimed at local government representatives responsible for the management of air quality in cities, where air quality management is the most urgent. In 2017, research by the Lancet Countdown on ...
On Monday at 3:17 p.m. an air quality alert was issued by the Texas Commission on Environmental Quality for Tuesday. The alert is for Wise, Denton, Collin, Hunt, Parker, Tarrant, Dallas, Rockwall ...
Ground-level ozone ( O3 ), also known as surface-level ozone and tropospheric ozone, is a trace gas in the troposphere (the lowest level of the Earth's atmosphere ), with an average concentration of 20–30 parts per billion by volume (ppbv), with close to 100 ppbv in polluted areas. [ 1][ 2] Ozone is also an important constituent of the ...