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【Abstract】In recent years， although industry in China has achieved rapid development， it also has brought about a number of environmental problems， such as the haze， which has gained an increasing concern in the whole society. The thesis presents certain Topographic and economic reasons， and comes up with some suggestions about how to reduce and tackle the haze in Chengdu.
【Key words】haze； causes； suggestions； pollution
I. Introduction
With the development of economy and industry， the haze is becoming more serious and threatening the health of people. It is necessary for us to deal with the haze and improve people’s life quality. Although the haze correlates with abnormal climate， it is mainly caused by human activities， including unreasonable industrial structure， high fossil fuels consumption， and intensive highway transportation. Chengdu， as one of the most population and prosperous regions in Sichuan Basin， considers fossil fuels as the primary energy resources， which causes great polluted emission. As a result， Sichuan Basin becomes one of the fourth highest incidences of haze regions. Considering the popularity and negative influence of haze in Sichuan Basin， especially Chengdu， it is very important that our government takes the scientific and rational policies to reduce haze pollution and promote ecological civilization construction. In this thesis， the author will analyze the causes of haze in detail and give some suggestions to reduce the haze to some extent.
II. Situation and causes of the haze
1. Situation of the haze
In the past few years， the haze has become more severe， and the incident days of haze have increased in most provinces， which badly affect people’s health. According to the data of “Statistical bulletin of national economy and social development in Chengdu”， it shows the haze in Chengdu gradually intensifies while it tends to reduce in 2014 （Table1）. From the table， it presents the air quality standard days has been decreasing greatly from 2011 to 2013， and it is worrying because it relates with our health and industrial structure. With too high haze， it can show that industrial structure is unreasonable and need further adjustment. Fortunately， in 2014， the situation starts to improve， and the air quality standard days are more one days than in 2013.
2. Causes of the haze
2.1 Topographic factors
Chengdu is located in the western Sichuan Basin， covering an area of 12121 square kilometers， and from wind direction， static wind is the most common wind direction， followed by the north wind in June， July， and August each year and the northeast wind in the rest of months， which is bad for the spread of pollutants （Dai， Tang，
【Key words】haze； causes； suggestions； pollution
I. Introduction
With the development of economy and industry， the haze is becoming more serious and threatening the health of people. It is necessary for us to deal with the haze and improve people’s life quality. Although the haze correlates with abnormal climate， it is mainly caused by human activities， including unreasonable industrial structure， high fossil fuels consumption， and intensive highway transportation. Chengdu， as one of the most population and prosperous regions in Sichuan Basin， considers fossil fuels as the primary energy resources， which causes great polluted emission. As a result， Sichuan Basin becomes one of the fourth highest incidences of haze regions. Considering the popularity and negative influence of haze in Sichuan Basin， especially Chengdu， it is very important that our government takes the scientific and rational policies to reduce haze pollution and promote ecological civilization construction. In this thesis， the author will analyze the causes of haze in detail and give some suggestions to reduce the haze to some extent.
II. Situation and causes of the haze
1. Situation of the haze
In the past few years， the haze has become more severe， and the incident days of haze have increased in most provinces， which badly affect people’s health. According to the data of “Statistical bulletin of national economy and social development in Chengdu”， it shows the haze in Chengdu gradually intensifies while it tends to reduce in 2014 （Table1）. From the table， it presents the air quality standard days has been decreasing greatly from 2011 to 2013， and it is worrying because it relates with our health and industrial structure. With too high haze， it can show that industrial structure is unreasonable and need further adjustment. Fortunately， in 2014， the situation starts to improve， and the air quality standard days are more one days than in 2013.
2. Causes of the haze
2.1 Topographic factors
Chengdu is located in the western Sichuan Basin， covering an area of 12121 square kilometers， and from wind direction， static wind is the most common wind direction， followed by the north wind in June， July， and August each year and the northeast wind in the rest of months， which is bad for the spread of pollutants （Dai， Tang，