托班教案保护地球英语作文100字七年级

保护地球英语作文

100

字七年级

球气候变暖，环境严重污染

;

环保意 识要提高，行动宜早不宜晚

;

节能减排走在前，要争先。我们要如何写一 篇保护地球的英语呢

?

下

面是第一给大家的保护地球英语 作文

100

字七年级，供你参考

!

The area of desert in the world is growing every year.

Many parts of the world which once had large populations

and produced plenty of crops, have bee deserts. Dunhuang in

China, deep in the heart of the Gebi Desert, was once a

great city.

Cattle are one cause of the problem. In good years,

famers increase the numbers of their cattle. Then one year,

the rains fail to e. The farmers do not want to kill any of

their cattle, so the cattle eat ail the grass and anything

that grows on poorer land. If this continues for several

years, the grass never grows again and the land bees a

desert. One suggested answer is for farmers to limit the

numbers of their cattle.

Another problem is that good soil is gradually lost. When

trees are cut down, there is nothing to hold the soil in

place on the hillside. So when if rains, the soil is washed

down the hills and into the rivers. Strong winds can also

blow away the valuable soil that lies on the top of the

fields.

Throughout history man has changed his physical

environment in order to improve his way of life. With the

tools of technology he has altered many physical features

of the earth. He has transformed woodlands and prairies

into farms and made lakes and reserviors out of rivers for

irrigation purposes or hydroelectric power. Man has also

modified the face of the earth by draining marshes and

cutting through mountains to build roads and railways.

However, man's changes to the physical environment have

not always had beneficial results. Today, pollution of the

air and water is an increasing danger to the health of the

pla. Each day thousands of tons of gases e out of the

exhausts of motor vehicles. Smoke from factories pollutes

the air of industrialized areas and the surrounding areas

of the countryside. The pollution of water is equally

harmful. The whole ecological balance of the sea is being