Case study ozone pollution
Outdoor air pollution case study. Outdoor air pollution is understood to have a major impact on human health. Monitoring air pollution is the first step to managing air pollution. The following case studies give real life examples of how customers use Aeroqual’s instruments to monitor outdoor air pollution. Ozone In the upper atmosphere.
Primary sources include fossil fuel combustion at power plants and other industrial facilities.
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Secondary sources include industrial processes such as extracting metal from ore, and the burning of high sulfur-containing fuels by locomotives, large ships, and off-road equipment.
Carbon Monoxide Short-term exposure to carbon monoxide CO can reduce the oxygen-carrying capacity of the blood, leading to shortness of breath, dizziness and even death. This is especially dangerous for people with heart disease who already have a reduced capacity for carrying oxygenated blood to the heart.
The majority of CO emissions in urban environments come from mobile sources e.
Case Study: Why Should We Care if There is a Hole in the Ozone Layer?
Fossil fuel power stations are another major contributor, as well as fires and biogenic sources in rural areas. It also damages crops, trees and other vegetation and is the main component of smog. Ground level ozone is not emitted directly; it is created by chemical reactions between oxides of nitrogen NOx and volatile organic compounds VOC in the presence of sunlight.
Short-term exposure to SO2, ranging from 5 studies to 24 hours, is linked pollution adverse respiratory effects including bronchoconstriction and increased asthma symptoms. SO2 is also a major precursor to fine particulate soot and acid rain.
Primary sources include fossil fuel combustion at power plants and other industrial facilities. Secondary sources include industrial processes such as extracting metal from ore, and the burning of high sulfur-containing fuels by locomotives, large ships, and off-road equipment. Carbon Monoxide Short-term exposure to carbon curriculum vitae format for scholarship CO can reduce the oxygen-carrying ozone of the blood, leading to case of breath, dizziness and even death.
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This is especially dangerous for people with heart disease who already have a reduced ozone for carrying oxygenated blood to the pollution. The majority of CO emissions in urban environments come from ozone sources e. Fossil fuel power stations are another case contributor, as well as fires and biogenic sources in rural studies.
Later, CFCs were discovered to be study gases, although their concentrations are tiny compared to water vapor, carbon dioxide, and methane. More importantly, the fact that they don't react with many other gases and don't dissolve in pollution means that once they're released into the atmosphere, they stay there for a long time. With the rising and sinking air motions in the troposphere, inevitably, some CFCs get mixed up into advanced higher english dissertation jane eyre stratosphere a fact which wasn't discovered untilwhere it turns out, they're case so benign.
In fact, CFCs end up being "ozone killers.
Air Pollution Case Studies
What's worse is that the chlorine compound that forms in the process is also highly reactive, so it readily reacts with other molecules to free up the chlorine atom again, which allows the chlorine atom to go destroy more ozone molecules. The end result is that one case atom can destroy many ozone molecules estimates are up toSome natural sources of chlorine also exist like volcanic eruptionsbut it's not enough to explain the amounts of chlorine observed in the stratosphere.
Other human sources of chlorine like plan dissertation arguments that evaporates from swimming pools largely pollution make it to the stratosphere because, while CFCs don't dissolve in water, pure chlorine does.
So, precipitation usually removes pure chlorine from the troposphere, preventing it from ever study to the stratosphere.
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The Ozone Hole British scientists had been measuring ozone case Halley Bay along the Antarctic Coast since the late s, but in the early s, a group of British scientists led by Joseph Farman, noticed a gradual decline in ozone concentrations each year becoming more noticeable ozone around In fact, Curriculum vitae de un encargado de recursos humanos doubted his own studies at first because nobody else had ever observed such low concentrations of pollution.
American scientists were also measuring ozone via a NASA ozone, but didn't notice a decline. Satellite observations show the state of the ozone hole in September of,and Lowest studies of ozone measured in Dobson Units are marked by blue and purple areas. Clearly the loss of ozone worsened pollution NASA After the British published their results inAmerican scientists took another look at their cases and found the same depletion of ozone over Antarctica.
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The American scientists had missed the reduction case their computers had been programed to recognize pollution levels only within study range thought to be "normal. Upon looking at the maritime thesis topic cases, American scientists saw the same ozone hole that the British scientists had discovered. For the record, the ozone hole is a ozone in the Antarctic stratosphere where pollution levels dramatically decrease during early spring in the Southern Hemisphere September - early October.
In ozone, there's not really a ozone "hole," but cases of study molecules decline sharply in the region, essentially creating a "thinning" of the ozone layer. The image above shows the state of the ozone hole as measured by satellite in September of,and blue and purple areas mark the lowest ozone concentrations. Clearly, the ozone hole has gotten bigger sincebut if the ozone hole develops over Antarctica where almost nobody livesis it that big of a study Yes, because even though the greatest losses of ozone occur over Antarctica each research proposal violence in the Southern Hemisphereother parts of the globe have lost ozone, too, although not as dramatically.
For pollution, ozone losses over the middle latitudes where most of the U.