Haze is air pollution in which is mixed up with dust, smoke and other dry particles ,and it obscure the clarity of the sky and interacts with the natural environment.
This kind of air pollutant come from a variety of natural and manmade sources. Natural sources can include windblown dust, and soot from wildfires. Manmade sources can include motor vehicles, and industrial fuel burning, and manufacturing operations. The one of the main cause that touches off haze is manufacturing operations. Many factories were over measure produced the smog that had over the standard and the smog seriously influence the air become air pollution.
The components that make up haze may have negative effect on peoples health especially that of the children and the elderly. Also not excluded are those who have certain diseases such as asthma, allergy, and pneumonia and lung disease. Workers working in the open air have a high risk in their health.
One of effective solutions to help eliminate haze is to make some chemistry changes during the manufacturing process,so it could reduce harmful emissions which are produced by manufacturing operations
仁爱版英语八上《Topic 1 Are you going to play basketball》ppt课件
仁爱版英语八上《Topic 1 Are you going to play basketball》ppt课件之一
仁爱版八上《Topic 1 You’d better go to see a doctor》ppt课件B
仁爱版英语八上《Topic 1 You’d better go to see a doctor》ppt课件之三
仁爱八上Unit 2 Topic1 Section A
仁爱版英语八上《Topic 2 Would you mind passing me some water》ppt课件
仁爱八上Unit 3 Topic 2 Section D
仁爱版九上《Topic 3 Would you like to be a greener person》ppt课件C
仁爱版八上《Topic 1 Are you going to play basketball》ppt课件A
仁爱版英语八上《Topic 1 You’d better go to see a doctor》ppt课件之一
仁爱八上Unit 1 Topic2 Section A
仁爱版八上《Topic 1 Plants and animals are important to us》ppt课件D
仁爱版英语八上《Topic 1 What hobbies did you use to have》ppt课件之一
仁爱版英语八上《Topic 3 What should we do to fight SARS》ppt课件
仁爱八上Unit 1 Topic 1 SectionA
仁爱版英语八上《Topic 2 What sweet music》ppt课件
仁爱版英语八上《Topic 2 What sweet music》ppt课件之一
仁爱版英语八上《Topic 2 I like country music》ppt课件
仁爱版英语八上《Topic 3 The students used live models, didn’t they》ppt课件
仁爱八上Unit 1 Topic3 Section A
仁爱版英语八上《Topic 3 Must we do exercise to prevent the flu》ppt课件
仁爱版英语八上《Topic 3 What were you doing from seven to nine yesterday》ppt课件
仁爱版八上《Topic 2 I am sure there are no UFOs》ppt课件B
仁爱版八上《Topic 1 You’d better go to see a doctor》ppt课件A
仁爱版八上《Topic 3 The students used live models, didn’t they》ppt参赛课件(含素材文件)
仁爱版英语八上《Topic 1 Plants and animals are important to us》ppt课件之一
仁爱八上Unit 1 Topic2 Section C
仁爱版八上《Topic 1 Are you going to play basketball》ppt课件C
仁爱版英语八上《Topic 2 I am sure there are no UFOs》ppt课件
仁爱八上Unit 2 Topic3 Section A
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |