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Air pollution has become a significant problem in the US as well as the world over years. It's the result of variety of sources like industrial, agriculture, mechanical and transportation. Sadly, transportation which releases a great amount of carbon dioxides, nitrogen oxides and other toxicity is proven the leading cause of air pollution. There are several transportation factors that contribute to air pollution in the US. The first factor is the excessive use of SUVs and cars. Vehicle has played an important role in the US because of its use of connecting people to anyplace. As "America's population of automobiles & drivers are increasing" (Davis), it's true that every households has the average of 2 or 3 cars in their garage. It means most of people have their own car. In developed country like US, there is high level of activities that requires people to move around a lot. They like to use cars as their favorite transportation even if it just takes 5 minutes to go to Wal-Mart or grocery, then cars become necessary in their life. Whenever cars are turned on, they pollute. The author of "Car, Pollution and Environment" lets us know that cars harm the air by releasing "30 percent of the carbon dioxide" from "the combustion system" ("Car, Pollution and Environment"). Then, just imagine millions cars are running on the way everyday to see how much it affects our environment. In addition, with their bigger size, weight and guzzling engine, SUVs are more likely to burn more gas than cars do. For example, one article reported that "a new Dodge Durango sports utility vehicle (with a 5.9 liter engine) that gets 12 miles per gallon in the city will emit an estimated 800 pounds of carbon dioxide over a distance of 500 city miles. [...] A new Honda Insight that gets 61 miles to the gallon will only emit about 161 pounds of carbon dioxide over the same distance of 500 city miles (Ecobridge)". One aspect of this factor is the "persistence of old and outdated technology" in the SUVs and cars' fleet (Gorham). In a family, higher-income members tend to get a new cars and leave it for lower-income ones. Therefore, the old cars are still on our road until its usefulness has expired. So it's a problem that people have recognized since older cars pollute more than new ones do. As the same size and model, older vehicles are more likely inefficient than new ones as they use the obsolete technology which wastes a lot of gas and produces carbon dioxide (Car Heaven). Commonly vehicle' age is 10 years-old or higher (Gorham). As their ages are getting higher, they are more losing their efficiency. For example, "A 14 year old vehicle produces 19 times more smog-forming emissions than a 2004 or newer model (Car Heaven)". The second factor is the permissive regulation on truck emissions. Sean, a senior editor at American city & County's sister publication, said that diesel trucks have been a pollution emitter over years. "While they make up only 2 percent of vehicles in the nation, diesel trucks produce exhaust that is responsible for more than 60 percent of all particulates and nearly half of all nitrogen oxides, according to EPA (Sean)". In fact, the number of diesel trucks is less than private vehicles, and most of these trucks are using to do "commercial" task, thus the US government considers it's not an issue of great concern (Truck Emissions Control Regulations). Once, one article reported that 2007 truck emission regulations is set by EPA "limits the sulfur content" of 15ppm drop from the 500ppm fuel used now. Meanwhile, retailers are still allowed to keep manufacturing 20% of 500ppm fuel in the total of diesel that are produced until the end of 2009. Plus, the author of "Truck Emissions Control Regulations" pointed out that "Beginning in 2011 all diesel equipment manufactured in the United States of America must be manufactured with truck emissions control devices as standard equipment. [...] The old plan that is being referred to is the long-term plan to introduce emissions control regulations into the automobile manufacturing industry" (Truck Emissions Control Regulations). It means up to now there are still diesel trucks that use 500ppm fuel driven off the road, and there are no systems to control the emission from these trucks. One aspect of this factor is the excessive of truck idling. For number of reasons, truckers idle their vehicles a lot. Irrespective of hot or cold weather, drivers let their trucks idle at least 5 minutes a day to keep running the AC and others applications like car charging, radio or TV. In addition, some truckers think idling can make the engine easy to start up. Easily, we can see it often happens at the truck stops, rest areas or ports. In the context of "Straight Answers on Advanced Technologies", the author shows that during the driving time of fourteen hours, drivers have the resting time of ten hours. Thus the total idling time that is calculated each year is nearly "1830 hours" ("Straight Answers on Advanced Technologies"). Therefore, ways to do these things contribute to pollute the air since they waste lot of fuel and result in high levels of carbon dioxide and nitrous oxides. For instance, Sharke said that the number of fuel that truck idling combusts annually in the US is greater than 800 million gallons (Sharke). The third factor is the low use of public transportation. It seems that using public transportation is the useful way to reduce the number of cars on the road. However, in the US, the number of people using public transportation like buses or trains is very small. Russell, a demographer and the editorial director of New Strategist Publications, gives the statistic that there are just 5% of people who go to their workplace by "public transit" (Russell) .The reason for this is nowadays every family has at least one car, and for many people it's faster to drive than taking public transportation. For example, no one wants to wake up early in the morning, walk to the bus stop and wait for the bus coming. It wastes too much time. In addition, the route of the transit is not convenient because they don't drive the riderships directly to where they want. Even if there are few or no passengers, public transportations still run on the road through their routine. Therefore, it is easy to imagine what would happen is they pollute as much as cars or SUVS do. In another word, private vehicles and public transportation create significant emission in to the atmosphere at the same time.
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Transportation and Air Pollution in the United States
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Transportation And Air Pollution In The United States

Words: 1092    Pages: 4    Paragraphs: 6    Sentences: 61    Read Time: 03:58
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              Air pollution has become a significant problem in the US as well as the world over years. It's the result of variety of sources like industrial, agriculture, mechanical and transportation. Sadly, transportation which releases a great amount of carbon dioxides, nitrogen oxides and other toxicity is proven the leading cause of air pollution. There are several transportation factors that contribute to air pollution in the US.
              The first factor is the excessive use of SUVs and cars. Vehicle has played an important role in the US because of its use of connecting people to anyplace. As "America's population of automobiles & drivers are increasing" (Davis), it's true that every households has the average of 2 or 3 cars in their garage. It means most of people have their own car. In developed country like US, there is high level of activities that requires people to move around a lot. They like to use cars as their favorite transportation even if it just takes 5 minutes to go to Wal-Mart or grocery, then cars become necessary in their life. Whenever cars are turned on, they pollute. The author of "Car, Pollution and Environment" lets us know that cars harm the air by releasing "30 percent of the carbon dioxide" from "the combustion system" ("Car, Pollution and Environment"). Then, just imagine millions cars are running on the way everyday to see how much it affects our environment. In addition, with their bigger size, weight and guzzling engine, SUVs are more likely to burn more gas than cars do. For example, one article reported that "a new Dodge Durango sports utility vehicle (with a 5. 9 liter engine) that gets 12 miles per gallon in the city will emit an estimated 800 pounds of carbon dioxide over a distance of 500 city miles. [. . . ] A new Honda Insight that gets 61 miles to the gallon will only emit about 161 pounds of carbon dioxide over the same distance of 500 city miles (Ecobridge)".
              One aspect of this factor is the "persistence of old and outdated technology" in the SUVs and cars' fleet (Gorham). In a family, higher-income members tend to get a new cars and leave it for lower-income ones. Therefore, the old cars are still on our road until its usefulness has expired. So it's a problem that people have recognized since older cars pollute more than new ones do. As the same size and model, older vehicles are more likely inefficient than new ones as they use the obsolete technology which wastes a lot of gas and produces carbon dioxide (Car Heaven). Commonly vehicle' age is 10 years-old or higher (Gorham). As their ages are getting higher, they are more losing their efficiency. For example, "A 14 year old vehicle produces 19 times more smog-forming emissions than a 2004 or newer model (Car Heaven)".
             
              The second factor is the permissive regulation on truck emissions. Sean, a senior editor at American city & County's sister publication, said that diesel trucks have been a pollution emitter over years. "While they make up only 2 percent of vehicles in the nation, diesel trucks produce exhaust that is responsible for more than 60 percent of all particulates and nearly half of all nitrogen oxides, according to EPA (Sean)". In fact, the number of diesel trucks is less than private vehicles, and most of these trucks are using to do "commercial" task, thus the US government considers it's not an issue of great concern (Truck Emissions Control Regulations). Once, one article reported that 2007 truck emission regulations is set by EPA "limits the sulfur content" of 15ppm drop from the 500ppm fuel used now. Meanwhile, retailers are still allowed to keep manufacturing 20% of 500ppm fuel in the total of diesel that are produced until the end of 2009. Plus, the author of "Truck Emissions Control Regulations" pointed out that "Beginning in 2011 all diesel equipment manufactured in the United States of America must be manufactured with truck emissions control devices as standard equipment. [. . . ] The old plan that is being referred to is the long-term plan to introduce emissions control regulations into the automobile manufacturing industry" (Truck Emissions Control Regulations). It means up to now there are still diesel trucks that use 500ppm fuel driven off the road, and there are no systems to control the emission from these trucks.
             
              One aspect of this factor is the excessive of truck idling. For number of reasons, truckers idle their vehicles a lot. Irrespective of hot or cold weather, drivers let their trucks idle at least 5 minutes a day to keep running the AC and others applications like car charging, radio or TV. In addition, some truckers think idling can make the engine easy to start up. Easily, we can see it often happens at the truck stops, rest areas or ports. In the context of "Straight Answers on Advanced Technologies", the author shows that during the driving time of fourteen hours, drivers have the resting time of ten hours. Thus the total idling time that is calculated each year is nearly "1830 hours" ("Straight Answers on Advanced Technologies"). Therefore, ways to do these things contribute to pollute the air since they waste lot of fuel and result in high levels of carbon dioxide and nitrous oxides. For instance, Sharke said that the number of fuel that truck idling combusts annually in the US is greater than 800 million gallons (Sharke).
             
              The third factor is the low use of public transportation. It seems that using public transportation is the useful way to reduce the number of cars on the road. However, in the US, the number of people using public transportation like buses or trains is very small. Russell, a demographer and the editorial director of New Strategist Publications, gives the statistic that there are just 5% of people who go to their workplace by "public transit" (Russell) . The reason for this is nowadays every family has at least one car, and for many people it's faster to drive than taking public transportation. For example, no one wants to wake up early in the morning, walk to the bus stop and wait for the bus coming. It wastes too much time. In addition, the route of the transit is not convenient because they don't drive the riderships directly to where they want. Even if there are few or no passengers, public transportations still run on the road through their routine. Therefore, it is easy to imagine what would happen is they pollute as much as cars or SUVS do. In another word, private vehicles and public transportation create significant emission in to the atmosphere at the same time.
Pollution Essay 
+2
1. "Causes of Global Warming." Ecobridge. N.p. n.d. Web. 18 Oct. 2009.
2. Davis, Tony. "Cars and Air Pollution." ADEQ 1 Apr. 2009. Web. 20 Oct. 2009.
3. Gorham, Roger. "Air Pollution from Ground Transportation."
Kilcarr, Sean "Cleaner Road Ahead." American City & County 121.2 (2006): 32-34. Academic Search Complete. EBSCO. Web. 15 Oct. 2009.
4. "The Car, Pollution, and the Environment." 123HelpMe.com. 20 Oct. 2009.
5. "Truck Emissions Control Regulations."
6. Sharke, Paul "Idle Hour." Mechanical Engineering 127.1 (2005): 32-34. Academic Search Complete. EBSCO. Web. 27 Oct. 2009.
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