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2017年托福作文素材：环境变化
有人认为人类活动是环境变坏，对此你怎么认为?
Some people believe that the Earth is being harmed (damaged) by human activity. Others feel that human activity makes the Earth a better place to live. What is your opinion? Use specific reasons and examples to support your answer.
托福参考范文之一
People have been living on the Earth for thousands of years. Human activity influences the Earth. Some people believe that the Earth is being harmed by human activity. Others feel that human activity makes the Earth a better place to live. In my opinion， the earth is being damaged by human activity. There are many statements supporting my opinion.
Human activity has damaged natural environment and almost exausted natural resources. Modern industry needs more and more resources， including minerals， fuels and water. So we confront of the serious problems such as the lack of fuels and water. Ecological balance is damaged because factories occupy many places where animals and plants live. More and more buildings are constructed and forests become less and less. If we cannot recognize these problems and solve them soon， we would finally lose the environment suitable for our living.
An other serious problem is “the green-house effect.” Human activity decreases forests and increases the usage of fuels so that the gas of carbon dioxide is output more and more and there are not enough plants to absorb it. The green-house effect is more obvious and more sensible these years. Due to the effect， icebergs in the south polar and north polar melt and the sea level becomes higher than before. I am worried about the cities nearby the sea and hope scientists find an effective method to eliminate the green-house effect.
Although we have advanced machines and our life seems more comfortable than before， we have less chances to approach natures and less spaces to act. The cities become bigger and if we want to have a picnic with our friends， we have to drive a long distance to find a natural place. In fact， the spaces of human activity are being damaged by the skyscrapers and factories.
From the above statements， we can conclude that human activity brings the Earth many damages. Fortunately people have recognized the point and I believe that the Earth will become a better place to live with our ceaseless efforts.
托福参考范文之二
Nowadays our Earth faces a number of serious problems， such as the environment pollution， the increasing population， the fatal effects of nuclear weapons， and so on. So some people believe that the Earth is being harmed by human activity. But as far as I am concerned that human activity makes the Earth a better place to live and also makes some negative effects in this process. My arguments for this point are listed as follows.
Even though we face so many crisis， no one can deny that Earth are more suitable for human habitation. That is the result of the efforts of generations of people. If without that， we might also live in caves and eat the crude food just like wild animals. If that is true， we must haven't time and energy to think over the problems of the Earth because we have to look for food and avoid becoming the food of other animals. At that state， whether the Earth were harmed is not important for human because some certain crisises can annihilate the total population， such as some infectious disease or the a change of climates.
It is inevitable to produce some positive aspect functions when human are struggle to improve the survive abilities and from the experiences of history we also have make great effort to resolve this kinds of problems. For example， most of people hope to limit the scope of nuclear weapons and the protection of environment is accept by almost every one. Most of problems are controlled by ourselves and some of them have the hope to be resolved in years. We are finding the balance between the development and the protection of our Earth. So it is unnecessary to deny the advancement of human.
For the reasons presented above， we admit that there are some problems in the process of the human development， but those problems are resolving and as a whole we make the Earth a better place to live. Human evolved in the mode of continuing to correct their mistakes and making a better progress.
托福参考范文之三
The quality of human life has improved greatly over the past few centuries， but Earth is being harmed more and more by human activity. As we develop our technology， we demand more from our planet. Eventually， this will harm people as well.
Our planet gives us everything we need， but natural resources are not endless. Strip mining devastates whole regions， leaving bare and useless ground. Deforestation removes old growth trees that can't be replaced. Too much fishing may harm fish populations to the point where they can't recover. We are too careless in taking what we want without giving anything back.
There are more people than ever， living longer than ever. So is it any surprise that many areas suffer from too much development? Anyone living in or near a city has experienced “urban sprawl.” There is a new shopping area on every corner and new houses， townhouses and apartments everywhere. Traffic gets worse and worse because planners can't keep up with growth. Keeping up with human demand is hard enough. Environmental concerns come in last.
With growth comes pollution. Companies and communities dump waste into water. Landfills are full of trash. Emissions from factories pollute the air. Barrels of industrial waste and worse， radioactive waste， have no safe place to go. If we're not careful， we can harm our planet beyond repair. People need to respect the Earth and try to preserve it. If we don't， what kind of future will we have?