2020关于空气污染的英语演讲稿.doc

2020关于空气污染的英语演讲稿

空气污染给我们的身体健康带来了严重威胁。以下是我带来的关于空气污染的英语演讲稿，希望对你有帮助。

篇一：

Teachers students:

hello everybody

Today I lecture on the topic of air pollution. Air pollution is a new branch of atmospheric science it is to study in different weather conditions into the atmosphere of the pollutants in the atmosphere transmission dilute diffusion transformation and remove the rule and application of science. This subject originated from the 20XX s 20 xx years British atmospheric diffusion experiment was carried out but only in the '50 s the development of modern industry and city population is highly concentrated there appeared the serious urban or industrial pollution events in December 20 xx's London smog event for example took the lives of more than four thousand people these make people wide attention and research of atmospheric pollution to the 60 s then gradually formed this new independent discipline.

Air pollution due to human activity or natural process and out into the atmosphere into some harmful substances (pollutants) when the amount of discharged into enough (pollutant concentration up to a limit) makes the original clean air quality to drop if this situation is maintained long enough will be to humans animals plants and the atmosphere cause harm and adverse effects of the atmospheric state known as air pollution. Of air pollution has three elements: the concentration of pollution sources and pollutants harm to human and biological.

Clean the atmosphere is one of the necessary conditions for the survival of humans in one person in five weeks no eating or five days without drinking water to be able to sustain life but not breathing air for more than 5 minutes then die the body to absorb every day 10- cubic meter of air. Thus eliminating air pollution or keep pollution concentration falls below a certain limit is how important.

Pollution sources and pollutants discharged into the source of harmful substances into the atmosphere pollution sources harmful substances into the atmosphere pollutants. Atmospheric pollution source points of artificial and

natural sources

The harm of air pollution and influence

Atmospheric pollution on human and environment caused by the harm and influence has gradually been recognized in the aggregate has the following several aspects:

(1) the harm to human health. Human suffering has three pollute the air surface skin contact with the air inhaled and eating food containing atmospheric pollutants besides can cause respiratory and lung diseases but also on the cardiovascular system liver etc serious can take away the life.

(2) the harm of biological. Animals because of the inhaled air pollution or eat foods containing contaminants and disease or death atmospheric pollutants can make the plant disease resistance drop influence the growth leaf spot wither or die.

(3) the harm of items. Such as the textile clothing leather metal products construction materials culture art etc. chemical damage and defiled damage.

(4) cause acidic precipitation such as agriculture forestry fresh water aquaculture.