全球变暖的英语演讲稿范文

1、 全球变暖的英语演讲稿范文全球变暖的英语演讲稿范文1 Earths temperature begins with the Sun. Roughly 30 percent of incoming sunlight is reflected back into space by bright surfaces like clouds and ice. Of the remaining 70 percent, most is absorbed by the land and ocean, and the rest is absorbed by the atmosphere. The absorbe

2、d solar energy heats our planet. As the rocks, the air, and the seas warm, they radiate “heat” energy (thermal infrared radiation). From the surface, this energy travels into the atmosphere where much of it is absorbed by water vapor and long-lived greenhouse gases such as carbon dioxide and methane

3、. When they absorb the energy radiating from Earths surface, microscopic water or greenhouse gas molecules turn into tiny heaters like the bricks in a fireplace, they radiate heat even after the fire goes out. They radiate in all directions. The energy that radiates back toward Earth heats both the

4、lower atmosphere and the surface, enhancing the heating they get from direct sunlight. This absorption and radiation of heat by the atmospherethe natural greenhouse effectis beneficial for life on Earth. If there were no greenhouse effect, the Earths average surface temperature would be a very chill

5、y -18C (0F) instead of the comfortable 15C (59F) that it is today. 全球变暖的英语演讲稿范文2 I often see on television, network is now the holes of the earth has been destroyed by human, if we are in different heart to protect it, the destruction of the earth will be completely in the near future. Faster and fa

6、ster, with the development of human science and technology science and the negative effect gradually manifested, then let me give you a few examples to illustrate why experts predicted that the earth will be gone after so many years. First of all, global warming is one example, soak in the hot weath

7、er in summer air conditioning becomes a new hobby, but what do people ever thought of air conditioning can bring negative effect? Gas air conditioning to contain large amounts of methane, to the outside is the leading cause of global warming gases, methane and air conditioning will waste a lot of el

8、ectricity, so try to avoid using the air conditioning or appropriate use. Another reason is that carbon dioxide, automobile exhaust and factory waste gas containing a large amount of carbon dioxide, and carbon dioxide are most likely to lead to global warming. Cars now, too much exhaust serious affe

9、ct our nong cough, throat inflammation. . According to concerning sectional statistic Chinas per capita emissions of carbon dioxide emissions every year 2. 51 tons a year! The changes in the harsh environment around us. More important reason is that: reduce forest, farmland, water damage and serious

10、 water pollution, fresh water supply is a problem, many parts of the draft has become a big problem. Now countries are massive effort, demanding, and costs of the south-north water diversion project. In order to save the planet, people all over the world should be: dont open air conditioning, use re

11、cycled environmental protection bags, dont use plastic bags, take the bus, dont throw waste batteries. Such as the dribs and drabs in life. In fact, environmental protection is not difficult, as long as you support is the best gift you give earth environmental protection, take action, this is a powe

12、rful force! 全球变暖的英语演讲稿范文3 With the development of economy, more and more greenhouse gases are being discharged into the air. CO2 makes up about 70% of the greenhouse gases, which is considered to be one of the greatest causes of global warming. It has harmful effects, causing the sea level to rise a

13、nd many natural disasters to strike. So we must take effective measures to save our planet. First, we should use more clean energy and less coal and oil. Second, we should go to work on foot or by bus instead of driving a car if possible. Third, we should plant more trees, because plants can turn CO

14、2 into oxygen. More importantly, we should form the habit of saving energy in our daily life. 全球变暖的英语演讲稿范文4 No one，regardless of race, religion or nationality, can deny that the world we live in is becoming increasingly intolerable because of the effects of global warming. According to many experts,

15、 even greater impacts are still on the way. There are numerous causes for this problem. On one hand, human-related emissions of carbon into the atmosphere is causing, and will in the future cause, significant global warming according to the theory. On the other hand, the lack of knowledge about the

16、importance of protecting environment hinders the solving of the It is urgent that immediate and effective actions should be taken right away. First, more trees need to be planted to help improve and beautify the environment. Besides, stricter laws concerning global warming and irresponsible use of f

17、uel resources have to be put into effect and achieved good results. In a word, there is a long way to go before we can take a comfortable world for granted again . 全球变暖的英语演讲稿范文5 People around the world may feel that the climate has been getting steadily warmer and warmer in recent years. Places whic

18、h used to be abundant in snowfall have frequently experienced snowfree(无雪的) winters. Drought lasts longer in some dry areas. People find that without air conditioners they could hardly work or fall asleep on hotter summer days. The side effects of global warming are alarminS. A warmer global climate melts the ice caps, raising sea levels. What is more, it disturbs weather patterns, causing droughts, severe storms, hurricanes (飓风). People suffer a lot from disasters relevant to