2020关于空气污染的英语演讲稿_关于污染的作文

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。以下是小编带来的关于空气污染的英语，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 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 '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 10-12 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.

(5) destroys the high-altitude ozone layer ozone hole

formation cause harm to human and biological survival

environment.

6. Impact on the global climate such as the increase in carbon

dioxide and other greenhouse gases will cause the earth's

atmosphere warms lead to increased global weather disasters

and aerosol particles such as smoke increase the atmospheric

turbidity solar radiation affect the longwave radiation the earth

may lead to abnormal weather climate.

How to prevention and control of atmospheric pollution

reduce the harm of air pollution and influence constitute a major

and urgent research subject. Prevention and control of

atmospheric pollution

Prevention and control of atmospheric pollution is a huge

system engineering need to be individual and collective national

and the joint efforts of the world can consider to take measures

in the following aspects:

(1) to reduce emissions. Use more pollution-free energy

(such as solar energy wind energy hydroelectric power) reform

the energy structure with low pollution energy (such as natural

gas) pretreatment of fuel (such as coal desulfurization) before

such as improving combustion technology can reduce emissions.

In addition before the pollutants into the atmosphere not use

dust smoke abatement technology condensing technology liquid

absorption technology recycling technology to eliminate some

pollutants in the exhaust and can reduce the amount of

pollutants into the atmosphere.

(2) to curb emissions and make full use of atmospheric self-purification ability. Different meteorological conditions the

capacity of the atmospheric pollutants into the same amount of

pollutants the pollutant concentration was different. For wind

good ventilation turbulence strong convection area and time

atmospheric diffusion dilution ability is strong can accept more

corporations to inversion region and time atmospheric diffusion

dilution ability is weak cannot accept more pollutants otherwise

it will cause serious air pollution. Therefore respond to different

regions different times for the effective control of emissions.

(3) site selection design of chimney urban and industrial

planning should be reasonable don't emitters transition

concentration repeated superposition don't cause pollution

formation of local serious pollution incident.

(4) greening afforestation make more plants absorb

pollutants reduce atmospheric pollution.

Through the above explanation we know the importance of

air for our human right from now on please protect the

environment afforestation and create a better living environment!

Today my speech is that under the flag of thank you.

篇二：

1. Power Generation

Siting fossil fuel power stations in mainly rural areas and

distributing the pollution produced more evenly via tall chimneys

has resulted in improved urban air quality though they still

remain a major source of pollution mainly sulphur dioxide and

nitrogen oxides.

Better dispersion of pollutants emitted by tall chimneys leads

to better dilution in the air and thus lower local concentrations

of pollutants. This has however led to pollution being dispersed

more widely and to transboundary air pollution.

2. Other Industry and waste disposal

Although fossil fuel power plants are the major source of

industrial air pollution in many countries all industry and many

businesses large and small can be significant local sources of a

wide range of air pollutants.

All waste has the potential to affect the environment

adversely by contaminating the air soil or water. Poorly managed

waste disposal sites (landfill or incineration) can also pose a

danger to public health through all these routes.

3. Road Transport

Air pollution from motor vehicles has in many countries

replaced coal smoke as the major cause for concern; and the

continuing growth in vehicle use means that efforts to reduce

emissions from individual vehicles are in danger of being

overtaken by increases in the volume of traffic.

The air pollutants produced as a result of the use of motor

vehicles present a two-stage problem: primary and secondary

pollutants. Primary pollutants produced by petrol-powered

vehicles include carbon monoxide nitric oxide benzene

particulate matter and lead. Much of the lead emitted by vehicles

burning leaded petrol emerges as particles. Secondary pollutants

produced as a result of the use of petrol-engined vehicles include

nitrogen dioxide and ozone.

4. Domestic Sources

As temperatures across the region plummeted domestic

burning of coal across northern China becomes the primary

source of air pollution. Other important domestic sources of air

pollution are:

Stoves and cookers produce carbon monoxide. If ventilation

is inadequate or appliances poorly maintained CO may

accumulate in dangerous concentrations. Nitrogen dioxide is

also generated and concentrations in kitchens will usually exceed

those outdoors when cookers are in use.

Bonfires garden incinerators and barbecues can be a

significant local smoke and odour nuisance. Burning garden

waste produces smoke especially if it is damp and smouldering

rather than dry and blazing. The smoke contains CO and other

noxious and irritating compounds. Problems may be caused for

asthmatics bronchitis sufferers or those with heart conditions.

Even if the immediate health risk is small bonfires add to the

general background level of air pollution.

5. Agriculture

Agricultural practices can also be a significant source of

nuisance contributing both to local levels of air pollution and

causing odour problems. The main sources of pollution are the

burning of agricultural waste or of crops in the field and large

intensive livestock units. Depending on soil type and fertilisation

the nitrogen in the dung and urine of grazing cattle contributes

20-40% of nitrous oxide emissions from agricultural land;

methane is also emitted by cattle and other ruminants; nitrous

oxide and methane are of course both greenhouse gases.