How is ground-level ozone smog formed?
Ground-level ozone is formed by a chemical reaction between VOCs and oxides of nitrogen (NOx) in the presence of sunlight. Ozone concentrations can reach unhealthful levels when the weather is hot and sunny with little or no wind.
Is ground-level ozone and smog the same thing?
Ozone at ground level is a harmful air pollutant. Are ozone and smog the same thing? While the two terms are often used interchangeably for general use, smog is more complex. Smog is primarily made up of ground level ozone combined with other gases and particle pollution.
What 3 things are needed for the formation of ground-level ozone?
Unlike stratospheric ozone, which forms naturally in the upper atmosphere and protects us from the sun’s harmful ultraviolet rays, ground-level (or tropospheric) ozone is created through the interactions of man-made (and natural) emissions of volatile organic compounds and nitrogen oxides in the presence of heat and …
What is smog formation?
Photochemical smog is produced when sunlight reacts with oxides of nitrogen and at least one volatile organic compound (VOC) in the atmosphere. The chemical formation of air-borne particles and ground-level ozone takes place in the sunlight. Paints, gasoline and many cleaning solvents release VOCs into the atmosphere.
What is ground-level ozone pollution?
Ground-level ozone is a colorless and highly irritating gas that forms just above the earth’s surface. It is called a “secondary” pollutant because it is produced when two primary pollutants react in sunlight and stagnant air. These two primary pollutants are nitrogen oxides (NOx) and volatile organic compounds (VOCs).
What is ozone and how does it form as part of photochemical smog?
Ground-level ozone constitutes one of the major components of photochemical smog, so called because of the photochemical reaction of air pollutants such as nitrogen oxides (NOx) and volatile organic compounds (VOCs) with ultraviolet light (sunlight); thus, the O3 levels vary strongly with season and the highest levels …
How is smog formed?
Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. VOCs are released from gasoline, paints, and many cleaning solvents. When sunlight hits these chemicals, they form airborne particles and ground-level ozone—or smog.
What is the relationship between ozone and smog?
Ozone develops in the atmosphere from gases that come out of tailpipes, smokestacks and many other sources. When these gases come in contact with sunlight, they react and form ozone smog. The essential raw ingredients for ozone are nitrogen oxides (NOx) and volatile organic compounds (VOCs).
What is the formation of smog?
What is photochemical ozone formation?
Bioeconomy. Impact category that accounts for the formation of ozone at the ground level of the troposphere caused by photochemical oxidation of Volatile Organic Compounds (VOCs) and carbon monoxide (CO) in the presence of nitrogen oxides (NOx) and sunlight.
Why is ozone considered an air pollutant?
Which of following pollutants are responsible for the cause of smog?
2. Which of the following pollutants are responsible for the cause of SMOG? Sol: (c) Both incinerators and emissions from vehicles.