What factors contribute to smog formation in LA?
The other chemicals needed for smog to form are nitrogen monoxide, nitrogen dioxide, and hydrocarbons. All these chemicals are products of combustion. For smog to form, four main ingredients are needed: oxygen (O2 ), nitrogen oxides (NOx ), hydrocarbons, and UV light from the Sun.
What are the unique characteristics of Los Angeles type smog?
Los Angeles smog almost invariably occurs under conditions of low relative humidity (60% or lower). The visible part is composed very largely of aqueous, or at least water soluble, droplets, and only to a minor extent of solid particulate matter.
Which pollutant is responsible for Los Angeles smog?
Ozone is caused by chemical reactions between nitrogen oxides (NOx) and other pollutants. Nearly 75% of this pollution comes from mobile sources like cars, trucks, ships, trains, buses, planes, and construction equipment. Increasing heat due to climate change speeds up the creation of ozone.
Why the smog problem is so intense in Los Angeles?
Los Angeles smog is formed when the intense California sun triggers the reaction of organic compounds and nitrogen oxides from car exhaust to form ozone and particulates. The problem is made worse by the mountains surrounding the city, which trap the pollution.
What are the 2 types of smog?
At least two distinct types of smog are recognized: sulfurous smog and photochemical smog. Sulfurous smog, which is also called “London smog,” results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal.
What type of smog is harmful?
Smog is a serious problem in many cities and continues to harm human health. Ground-level ozone, sulphur dioxide, nitrogen dioxide and carbon monoxide are especially harmful for senior citizens, children, and people with heart and lung conditions such as emphysema, bronchitis, and asthma.
Who was most affected by the Great Smog?
Most of the victims were very young or elderly, or had pre-existing respiratory problems. In February 1953, Marcus Lipton suggested in the House of Commons that the fog had caused 6,000 deaths and that 25,000 more people had claimed sickness benefits in London during that period.
Where is smog most common?
Cities located in basins surrounded by mountains may have smog problems because the smog is trapped in the valley and cannot be carried away by wind. Los Angeles, California, and Mexico City, Mexico, both have high smog levels partly because of this kind of landscape.
Why is smog bad?
Why is it harmful? When inhaled, smog irritates our airways, increasing our risk of serious heart and lung diseases. These health risks are why many cities monitor smog levels. On a high ozone-alert day, for example, your eyes and throat may burn, and you may cough and wheeze.
Is LA smog getting better?
L.A. began 2020 with a clean-air streak but ended with its worst smog in decades. 14, 2020.
What is the difference between London smog and Los Angeles smog?
As the reaction take place in the presence of light to form the smog, it is called photochemical smog.
Classical Smog vs Photochemical Smog.
|London smog or Classical smog||Los Angeles smog or Photochemical smog|
|It involves smoke and fog (smog)||The word smog is misnomer here as it does not involve any smoke or fog.|
How can smog affect humans?
Smog can irritate your eyes, nose and throat. Or it can worsen existing heart and lung problems or perhaps cause lung cancer with regular long-term exposure. It also results in early death. Studies on ozone show that once it gets into your lungs, it can continue to cause damage even when you feel fine.
Why is air quality so bad in California?
The combination of three main factors are the cause of notable unhealthy levels of air pollution in California: the activities of over 39 million people, a mountainous terrain that traps pollution, and a warm climate that helps form ozone and other pollutants.
How bad is smog in LA?
Los Angeles began 2020 with a clean-air streak but ended with its worst smog in decades. In all, this year there were 157 bad air days for ozone pollution—the invisible, lung-searing gas in smog—across the vast, coast-to-mountains basin spanning Los Angeles, Orange, Riverside and San Bernardino counties.
What city has the worst air quality?
According to a 2009 report, around “60 percent of Americans live in areas where air pollution has reached unhealthy levels that can make people sick”.
Pollution level rankings 2019.
|1||Los Angeles-Long Beach, CA|