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Traffic Issue in Beijing

In: Social Issues

Submitted By lyh0308
Words 2389
Pages 10
Memo
Date: February 11, 2013
To: James H Tichgelaar
From: Yuhang Liang
Subject: Proposal for sustainable traffic system for modern city

Purpose
The purpose of this proposal is to study the method of reducing car exhaust in urban area in China. In long term, the goal is to increase air quality.

Introduction
As the population in the earth continues to increase, the consumption of earth resource such as fossil fuel become larger and larger. However, the total resource in the earth is not unlimited, if we continue unrestrained use of resource, we will run out of resource and the human beings will extinguish. Besides the limited resource, our current energy structure also caused many environmental problems. One of the problems is the air pollution caused by burning fossil fuel.

Usually, typical car exhaust includes carbon monoxide (CO), hydrocarbon (HC), oxides of nitrogen (NOx), and particulate matter with an aerodynamic diameter <10 μm (PM10) (Yao, Z. 2013). These gases are often considered to be the pollution source of our atmosphere. In order to improve the air quality and environment, we must control the emission of these toxic gases.

On January 2013, Beijing, the capital city of China has experienced severe smog weather that is caused by air pollution. PM2.5 particulates are tiny bits of matter that can penetrate deep into the lungs, and measurement of their density (or absence) in the air is used as a gauge for air quality. Usually, the World Health Organization considers the measurement of PM2.5 less than 25 micrograms per cubic meter and below to be safe. However, in Beijing, the value of PM2.5 is over 700 micrograms per cubic meter (Weather.com, 2012). The air pollution in Beijing has reached a dangerous level. One important factor for this bad weather is the heavy traffic. Since there are over 5 million registered cars in

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