!!!全球变暖 100字英语演讲稿

Question

关于全球变暖的100-150字英语演讲稿
高中水平
议论文
急等~~

Answer 1

Global Warming

There is little doubt that the planet is warming. Over the last century, the planets temperature has risen by around 1 degree fahrenheit (0.6 of a degree celsius). The warmest since the mid 1800’s was the 1990s. The hottest years recorded were 1997, 1998, 2001, 2002, 2003.

The United Nations panel on climate change projects that the global temperatures will rise 3-10 degrees fahrenheit by the century’s end - enough to have the polar caps all but melted. If the ice caps melt, a vast majority of our countries borders will be under water. Monuments and great buildings, as well as homes and lives will be under water, including New York City.

So now we know what some of the causes are for global warming, how can we as individuals do our part to help save the planet?

The answer is simpler than you may think. You don’t have to go miles away from home to protest, or spend masses of money. If you try to follow the few simple steps that I shall now give you, you will have started to help us all.

Firstly, plant a tree. This could be easier than it sounds. Join or help out a local wildlife group and ask to plant a tree. Trees, when fully grown, will help keep the planet cooler. On the same point, you could protest against the demolition of the rainforests. This is the same principle, we need the trees to cool our planet and yet they are chopping them down to create roads or homes.

Something as simple as walking instead of taking the car will help reduce pollution. As well as stopping pollution, you are giving yourself exercise, something important for our bodies. So the next time you get into your car, or your motorbike, think - do I have to make this journey by vehicle or can I walk?

When you are at home, and your getting a little cold. Put a jumper on and do not adjust the heating. The extra heat produced by our homes also affects the planet. So try wearing an extra layer in winter.

If possible, buy your fruit and vegetables from local suppliers. And try to avoid imported goods. The more foreign food that we import the more pollution from aeroplanes and boats it will create.

Keeping to the speed limit can also help the environment. The more you speed the more petrol you are going to use, making the pollution higher. Also, SUV’s make about six times their own weight in CO2 each year. A small efficient diesel car covering the same distance not only uses much less fuel; it makes two thirds less.

If possible use solar energy, after all it is free; all you need to buy is the equipment. You can get much of your hot water and heating from the sun and even generate electricity.

Reduce, reuse and recycle. Only buy what you need; don’t stock the cupboards with things you may or may not use. Reuse whatever you can, like containers and paper, and recycle what you cannot reuse. It really is as simple as that.

Finally turning off unused sources of power such as televisions and heaters will help the environment, as well as save you money.

If everybody stuck to these rules, we would be doing a great thing by protecting the earth. So please take into consideration what I have said, and try to do your part. After all, it will be our next generation that will feel the effects.

Answer 2

Global climate unexpected turn of events is warm
Earth’s atmosphere is ideally composed for life, with just the right mix of elements to sustain and support plants and animals. This mix includes small traces of greenhouse gases such as carbon dioxide, methane and nitrous oxide. Because they are composed of molecules of three atoms or more – C02, CH4, NO2-- they thicken up the atmosphere and help trap incoming sunlight after it has bounced off the Earth in the form of heat. Without them, the Earth would be a frozen iceball with temperatures hovering around 0 deg. Fahrenheit.

Greenhouse gases are a good thing, but we’ve all heard about the problems of too much of a good thing and that is clearly the case with greenhouse gases. Human activities are making massive changes in global atmospheric chemistry. Since the dawn of the industrial revolution 250 years ago, carbon dioxide has increased in the atmosphere by 31%, methane by 151% and nitrous oxide by 17%. And we have made new chemicals such as chlorofluorocarbons that are powerful greenhouse gases, not to mention ozone depleters. Around three quarters of greenhouse gases came from burning fossil fuels - coal, oil and natural gas. Most of the rest come from land use changes - primarily deforestation of tropical rainforests.

These changes rank on a geological time scale. Antarctic ice cores hold bubbles of air that perfectly reflect the atmosphere at the time the bubbles were captured. An ice core record going back 420,000 years proves conclusively there is far more carbon dioxide in the atmosphere than at any other time in that record, around 370 parts per million compared to a previous high of 300. CO2 levels are rising the fastest in at least 20,000 years. Drillings from ancient corals and other ocean sediments show it is highly likely that we are at a 20 million year high for carbon dioxide.

The ice core also reveals that this past 10,000 years, the entire period of human civilization, has seen the most stable climate in 420,000. By dramatically increasing greenhouse gases, humanity is threatening to radically destabilize the climate in ways we cannot predict. The more we study the past climate, the more it is evident that climate change can come in huge jolts. Instead of envisioning climate change as a line on a graph gradually going up, it might be better to see it as sharp steps, with each step holding jarring potential to disrupt civilization.

We already know the planet has warmed by around 1 deg. F in the past century. Most of the 10 hottest years on record took place in the past decade, while scientific studies indicate that decade was the hottest in 1,000 years. Meanwhile, severe storms have increased in the U.S., while over the past 20 years more areas of the planet have suffered from drought or flooding. Spring is coming around a week earlier to the Northern hemisphere, while populations of species from butterflies to marine creatures can be observed shifting north as the planet warms. Glaciers are retreating in mountains around the world, including our own in the Northwest, while the Greenland ice pack has started to melt. In the tropical oceans, corals are suffering and dying from warming waters, threatening the rich biodiversity of these “rainforests of the ocean.”

The mounting evidence for global warming caused the world's leading scientific authority on the topic to make its most conclusive statements to date. In 2001, the Intergovernmental Panel on Climate Change stated, “The warming of the last 50 years due to anthropogenic (human-caused) greenhouse gases can be identified.” The panel said temperature could rise by up to 5 degrees Celsius, or 11 degrees Fahrenheit, this century. That would be twice the entire warming after the last ice age 12,000 years ago, and it would take place in 100 years, rather than over thousands, giving the natural world and human civilization little time to adapt.

The American Geophysical Union, the nation's largest earth sciences association, recently stated, “there is no known geologic precedent for the transfer of carbon from the Earth's crust to atmospheric carbon dioxide, in quantities comparable to the burning of fossil fuels, without simultaneous changes in other parts of the carbon cycle and climate system.” Any remaining scientific uncertainty “does not justify inaction in the mitigation of human-induced climate change and/or the adaptation to it.”

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Global warming is the term used for the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades and its projected continuation. Models referenced by the Intergovernmental Panel on Climate Change (IPCC) predict that global temperatures may increase by 1.4 to 5.8 °C (2.5 to 10.5 °F) between 1990 and 2100. The uncertainty in this range results from both the difficulty of predicting the volume of future greenhouse gas emissions and uncertainty about climate sensitivity.

Global average near-surface atmospheric temperature rose 0.6 ± 0.2 °Celsius (1.1 ± 0.4 °Fahrenheit) in the 20th century. The prevailing scientific opinion on climate change is that "most of the warming observed over the last 50 years is attributable to human activities."[1] The main cause of the human-induced component of warming is the increased atmospheric concentration of greenhouse gases (GHGs) such as carbon dioxide (CO2), which leads to warming of the surface and lower atmosphere by increasing the greenhouse effect. Greenhouse gases are released by activities such as the burning of fossil fuels, land clearing, and agriculture.

An increase in global temperatures can in turn cause other changes, including a rising sea level and changes in the amount and pattern of precipitation. These changes may increase the frequency and intensity of extreme weather events, such as floods, droughts, heat waves, hurricanes, and tornados. Other consequences include higher or lower agricultural yields, glacier retreat, reduced summer streamflows, species extinctions and increases in the ranges of disease vectors. Warming is expected to affect the number and magnitude of these events; however, it is difficult to connect particular events to global warming. Although most studies focus on the period up to 2100, even if no further greenhouse gases were released after this date, warming (and sea level) would be expected to continue to rise since CO2 has a long average atmospheric lifetime.

Remaining scientific uncertainty comes from the exact degree of climate change expected in the future and particularly how changes will vary from region to region across the globe. A hotly contested political and public debate has yet to be resolved, regarding whether anything should be done, and what could be cost-effectively done to reduce or reverse future warming, or to deal with the expected consequences. Most national governments have signed and ratified the Kyoto Protocol aimed at combatting global warming. (See List of Kyoto Protocol signatories.)

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Answer 3

晕死，人家楼主说是高中水平的，你们弄得这么难，楼主背起来不累死啊，呵呵！！楼主，我尽量用常用词汇来表达你主题的！

The Global Warming
People around the world may feel that the climate has been getting steadily warmer and warmer in recent years. Places which used to be abundant in snowfall have frequently experienced snowfree 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 . People suffer a lot from disasters relevant to global warming.
To stop global warming we should make immediate and continual efforts. We hope the situation will soon change. Global warming catches and holds our concern, for it affects us and will affect our later generations. We cannot wait any longer. Do it. Do it right. Do it right now

参考资料：PS我在留学中

Answer 4

这么重量级的题材，150字太少了！下面是205字，如果觉得太长，最后一段40字可以去掉。
The topic of global warming is attracting the attentions of countries all over the world. This global warming is on such a scale that it will wreak havoc on both poor and rich countries. It could even make large sections of the earth uninhabitable.
What have caused global warming? The theory and evidence strongly suggest that human-related emissions of carbon into the atmosphere is causing, and will in the future cause, significant global warming.
How we should fight global warming? We should be taking active steps now to curb emissions and we should be engaging in international co-operation to do so. A simple natural way to fight global warming is to have escalating Taxes on carbon emissions. There is a simple reason why this is the ideal remedy: carbon emissions into the atmosphere constitute a nuisance to everybody on the planet; so those who make this nuisance should pay for their actions. A further recommendation is that there should be large-scale government support for research into new technology that will reduce carbon emissions.
China is the rising economic star; and if it also wants to assert world leadership status, it is a good opportunity for China to show the world that it has a moral commitment and the will to fight global warming.

Answer 5

Global warming is the increase in the average temperature of the Earth's near-surface air and oceans since the mid-twentieth century, and its projected continuation.
Increasing global temperature will cause sea level to rise, and is expected to increase the intensity of extreme weather events and to change the amount and pattern of precipitation. Other effects of global warming include changes in agricultural yields, trade routes, glacier retreat, species extinctions and increases in the ranges of disease vectors.
Most national governments have signed and ratified the Kyoto Protocol aimed at reducing greenhouse gas emissions, but there is ongoing political and public debate worldwide regarding what, if any, action should be taken to reduce or reverse future warming or to adapt to its expected consequences.