初中三分钟英语演讲稿
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初中三分钟英语演讲稿 篇1
At first, you must understand the meaning of climate change. It means any long-term significant change in the average weather, which may include average temperature, precipitation, wind patterns and so on. For example, Australia is experiencing rapid climate change. Since the middle of the twentieth century, Australian temperatures have risen by about average one temperature degree with an increase in the frequency of heat waves and a decrease in the numbers of frosts and cold days. Rainfall patterns have also changed, which means that the northwest has seen an increase in rainfall over the last fifty years while much of eastern Australia and the far southwest have experienced a decline. From this example, it indicates climate change that is occurring today has sped up, and affects long-term weather. The Earth’s climate is largely affected by how much heat is stored in the atmosphere. Furthermore, the climate change is caused by dynamic process on Earth, external forces including variations in sunlight intensity, and more recently by human activities.
The most important reason of climate change is caused by humans, because humans produce a lot of carbon dioxide into the air. This carbon dioxide emits from fossil fuel, aerosols, cement manufacture, land use, animal agriculture and deforestation. For example, trees can take in carbon dioxide to produce oxygen by photosynthesis. If people cut many trees for making furniture, paper, or sell wood to make money, there is much more carbon dioxide in the air. Beginning with the industrial revolution in the nineteenth century and accelerating ever since, the human consumption of fossil fuels has raised carbon dioxide levels rapidly. It means that carbon dioxide levels are substantially higher now than before. On the other hand, during the procedure of manufacturing cement, which is used in buildings, significantly more carbon dioxide is produced. While people improve their living standard, they cause climate change. When people burn coal, oil, and gas for our electricity, carbon dioxide is produced. When people burn fossil fuel to move vehicles, carbon dioxide is also produced. These sorts of examples indicate that humans are the real culprit. They do not consider the consequence, while they enjoy producing every thing they want.
It is not just man-made pollution of the atmosphere which can cause climate change. Changes in the amount of carbon dioxide in the air have occurred naturally during the history of the Earth, leading to climate changes. When a volcano erupts, it releases huge amounts of carbon dioxide and sulfur dioxide into the atmosphere. However, volcano eruptions cannot effect climate change. The main reason is that before the volcano erupts, it would release huge amount of carbon dioxide and sulfur dioxide for a very long time. This pollution injected into the air blocks out a lot of sunlight. Therefore, it can cause the Earth to cool over fewer years. For example, in April 1991 eruption of Mount Pinatoba, where is in the Philippine islands, emitted huge amounts of carbon dioxide and sulfur dioxide into the air. The movement of the Earth’s axis also affects climate change; it moves a little more than a half-degree each century. Other processes can change the Earth’s climate over millions of years. When not only continents move around the world, but also mountains ranges are built, the changing patterns of landmasses affect the way the heat in the atmosphere and in the oceans is stored. In addition, changes in the way ocean water circulates around the world can affect the climate, because the oceans store even more heat than the atmosphere. Once ocean currents change direction, slow down, or reverse, it has a significant impact on climate.
Climate change is mainly caused by carbon dioxide. This can be separated to two important parts: natural causes, and human causes. After we realise what the two important factors of climate change are, and what the climate change is, we could try to think of a more effective solution to solve the climate change problem to make a higher quality environment.
初中三分钟英语演讲稿 篇2
I really want to live in a world where disability is not the exception, but the norm. I want to live in a world where a 15-year-old girl sitting in her bedroom watching "Buffy the Vampire Slayer" isn't referred to as achieving anything because she's doing it sitting down. I want to live in a world where we don't have such low expectations of disabled people that we are congratulated for getting out of bed and remembering our own names in the morning. I want to live in a world where we value genuine achievement for disabled people, and I want to live in a world where a kid in year 11 in a Melbourne high school is not one bit surprised that his new teacher is a wheelchair user. Disability doesn't make you exceptional, but questioning what you think you know about it does. Thank you.
初中三分钟英语演讲稿 篇3
Students, guests , teachers and Honorable Judges
Good morning !
My great pleasure to share my dream with you today. my dream is to become a teacher....
As the whole world has its boundaries, limits and freedom coexist in our life. I don’t expect complete freedom, which is impossible. I simply have a dream that supports my life.
I dream that one day, I could escape from the deep sea of thick schoolbooks and lead my own life. With my favorite fictions, I lie freely on the green grass, smelling the spring, listening to the wind singing, breathing the fresh and cool air and dissolve my soul in nature at last. Simple and short enjoyment can bring me great satisfaction.
I dream that one day the adults could throw their prejudice of comic and cartoon away. They could keep a lovely heart that can share sorrow and happiness with us while watching cartoon or doing personal things. That’s the real communication of heart to heart.
I have the belief that my dreams should come true. I am looking forward to some day coming when I am like a proud eagle, which flies to the blue and vast sky.
初中三分钟英语演讲稿 篇4
We should learn to stick to our life no matter how difficult the life is and we should learn to love others .It is the flim tellsx me .
It is a story talks about a black girl named Precious .Precious isx fat and not beautiful. Her bad temped mother never workx, always cheated others to relieve her ,and atex while watching TV all day.What is worse ,Precious was only 16,but she had pregnant for twice .Out of assumption ,her child is her farther ''s child .Living in this life ,she alawys imagine to avoid facing her life .Fortunately,with the help and careneof the teacher and doctor ,her life became not so bad .
Precious has a tough life ,and if she gives up her life and does not join the adult education ,she will not meet the teacher and her life may not be changed .When we xfaced with the difficulty x,avoidingx is not a good way for us. It can not solve the problems.What we need to do is that analying the cause and trying to changed our place .So we should be brave and face the trap directly.
The film also teachs us to love others.Precious is someone who may exit near us .If precious own a good family and some friends,she may not fell so despaired. In spite of the development of our world ,there still many people suject misfortune.love and help can make them fell better ,so we should not scant our love .