Population Growth And Urban Road Emissions

B. Rates are often used, instead of absolute numbers, to determine how frequently a population or demographic event is occurring—rates show how common an event is. Rates also make it possible to compare countries that vary greatly in

The world population of 7.2 billion in mid-2013 is projected to increase by almost one billion people within the next twelve years. It is projected to reach 8.1 billion in 2025, and to further increase to 9.6 billion in 2050 and 10.9 billion by 2100. This assumes a decline of fertility for countries where large families are still prevalent as well as a slight increase of fertility in several countries with fewer than two children per woman on average.

With a declining or no use of cars can result in the reduction of pollution quite tremendously. They can by reducing the greenhouse effect. As the author reports in the article, “In German Suburb Life Goes On Without Care” by Elisabeth Rosenthal, “Passenger cars are responsible for 12 percent of greenhouse gas emissions in Europe… and up to 50 percent in some car-intensive areas in the United States.” Therefore, with cars being a leading factor of greenhouse gas emissions, reducing their usage would have a positive effect on the environment. After days of near-record pollution,

The U.S government has been actively involved in overseeing emission standards for years. This corresponds with the statement made by the U.S Department of transportation that, “Transportation is the largest end-use sector emitting CO2”, and also the statement released by the NRCAN in which, “Fuel usage & carbon dioxide emissions have grown steadily over the past two decades.” These factors are only to be associated with your average four door sedan and/or light truck. These do not include your 18 wheelers, heavy trucks, or the gas guzzling vans that emit more carbon dioxide into the air and are also on the road more today than ever have been before. Cars are readily and easily obtainable more so now than ever have been. This creates more fuel to be burned up in which produces more toxins to be constantly released into the atmosphere. In fact, according to Scientific American “cars relate as much as 30 gallons of GHG, while only driving 3 miles.” These miles can be correlated with something just as simple as your average work commute. According to the United States Census Bureau, “Nearly 600,000 full-time workers had "megacommutes" of at least 90 minutes and 50 miles.” Those workers alone would each be releasing up to 500 gallons of GHG. These can be considered some of the bigger factors that the greenhouse gasses have taken a toll on.

Pollution has become a heated issue in recent years. The destruction of the environment along with serious health problems are the eventual effects. The extensive use and availability of automobiles, tremendous amounts of production in the booming economy and the constant increase in demand for energy, can be held responsible.

The second largest source of greenhouse gas emissions in the United States is related to transportation, the burning of oil to produce energy in a combustion motor. The combustion process inside of engines is what produces the carbon matter that is emitted into the air through the exhaust system on gas-powered vehicles. Gas-powered transportation is accountable for 24 percent of the global carbon emissions; this should not come as much of a surprise given the amount of urban sprawl that is being seen in the United States and across the globe. In the past decade, the Environmental Protection Agency, the United States government, and major car manufacturers have been working in conjunction to find ways to provide a “greener” form of transportation (EPA, 2011). This has included testing the use of hydropower, ethanol, natural gas, biodiesel, and electricity as a means of powering vehicles, which has led to the introduction of hybrid vehicles. Hybrid vehicles run on electricity and gasoline, the byproduct of oil that is generally used in the engine combustion process of vehicles (U.S. Department of

First, cars pollute the environment. In 2012 the EPA reported that a whopping 28% of emissions came from transportation. As it says in the article “Running off the Road”, by Grover Kingsley, “With their largely petroleum based fuel, cars constantly spew carbon monoxide into the air.” We are responsible for the

This document specifically highlights how the Gold Coast City Council is tackling the city’s issue of traffic congestion by improving the existing structure of the roads and public transport. Hopefully this will decrease the number vehicles on the road which will reduce the amount of carbon emissions into the atmosphere (City of Gold Coast, 2013).

Climate change and transportation play a big role and it is important to be concerned for our future generations. The use of gasoline cars is a major producer in carbon dioxide emissions, although they are not entirely responsible for it—they play a role in it. Other form of transportations like buses and taxis also contribute to carbon dioxide emissions. The total amount of carbon dioxide emissions from an average car is seventy six percent which comes from usage of a vehicle containing gasoline. Efficiency has increased by twenty percent in regards to electric motors, especially when it comes to their wheels using no power when the car is at rest. Car ownership will increase and with this, improvements in technology could be a vital

If the public transportation improves, more and more people would take buses instead of driving. Then there would be less CO2 for our environment. Mohammad-Beigi, Nouri and Liaghati (2015) claim that the population in large cities is growing very fast, which means that transportation needs also increase really fast which leads to environmental problems. Therefore, in order to solve the problem, improving public transportation is a good solution. This study shows that driving cars really causes air pollution and it is harm for our environment. Phoenix is the largest city in Arizona, so the population growth in Phoenix will lead to the same problem that the three author mentioned. Improving public transportation will be helpful in decreasing the number of drivers and therefore reducing toxic emission. According to the PR Newswire Europe Improving public transportation in Brasilia (2009) claim public transportation is good because buses are more orderly, and they are safer and have less impact on the environment. It also shows that public transportation can help to reduce air pollution. Phoenix is an urban city like Brasilia, so it has a similar situation. Improving public transportation would be a good solution because it will lead to less driving. Then we will reduce exhaust gas

“Automobiles have a large impact on the quality of our environment and public health. Automobile use affects virtually every aspect of environmental quality - including noise levels, air quality, water pollution, and urban sprawl. Ninety percent of the environmental impact of automobiles occurs through the operation of the cars: about 10 percent from the production, raw materials and disposal of

 It wasn’t until the early 1970’s that car manufacturers saw a need to restrict the pollutants from their automobiles.  Thus came the advancements of new emission controlling components in the vehicles.  There was the catalytic converter which changed carbon dioxide into carbon monoxide, this change still resulted in pollution but significantly decreased the harm done.  Next came EGR which is Exhaust Gas Recirculation and forces unburned gas from the exhaust back into the engine making the car far more fuel efficient and environmentally friendly.  Unfortunately the next thing to follow was a serious toning down of the power of the engines.  The earlier thoughts were that bigger and more powerful were better, however these types of cars sent pollution caused by automobiles into an exponential growth.  The internal combustion engine vehicles that are on the road right now account for the vast majority of the air pollution around the world.  The electric vehicles, however, have zero emissions.  If this proposal is passed, then the condition of the urban airways will be

Macroscopic and microscopic scale models. Basic macroscopic emission models estimate emission based on the travel demand models (TDM) or traffic simulation models (TSM) by quantifying total travel distance and link-based average speeds as major variables (Frey and Liu, 2013). In these scenarios, the models failed to involve more rigorous driving activities, such as: instantaneous speed, acceleration profiles etc. to model on-road emissions. Typically, average-speed-based models estimate the emissions and fuel consumption using the trip based average speed of the traffic flow, disregarding the variation of the speed of the traffic flow (Ahn and Rakha, 2008). Most emissions and fuel consumption models were developed with data from dynamometer testing which are sufficiently accurate for macroscopic level emissions inventories. Since these testing are often done under steady state conditions, and so cannot reflect the

Automobiles are a major producer of greenhouse gas. One gallon of fuel burned puts five pounds of carbon dioxide into the atmosphere. Let’s say that an average car gets 25 miles to the gallon, and that car has a ten gallon tank. Every time a car gets filled up with gas, another fifty pounds of carbon dioxide have been put back into the atmosphere, and that is just one car. The automobile industry is very important to the world economy, so I am not saying that we should stop making cars, but there are other solutions. The recent trend of hybrid electric cars that get up to fifty miles to the gallon are becoming more popular. Also public transportation is very important. City dwellers that live downtown, do not need to drive their cars to work. Every major city has a form of public transportation that can get anyone around the city, and for that gallon of gas a bus burns the same five pounds reaches the atmosphere, but instead of one

Truck transportation has been the backbone of freight movements in the United States and across the globe for decades. While utilizing trucks is an economical way to move freight for short hauls of less than a 1,000 miles, there are high environmental and infrastructure costs for utilizing this mode of transportation. According to Lowe, road transportation’s use of energy resources rose 103 per cent in the period since 1970 (2005). Additionally, Lowe points out that road transportation’s emission of green house gasses, “increased by 76% between 1971 and 1989” (Lowe, 2005, p. 112). Furthermore, road transportation is the largest polluter in the industry. It utilizes “over 80% of the total energy used in the transport sector and contributes over 75% of its total CO2 output (Lowe, 2005, p. 113). Finally, freight transportation by heavy vehicles causes pavement damage at significantly higher rates than passenger traffic (SSTI, 2011).