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 no-snow 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 alarming. 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 global warming.However global warming is mainly due to human activities, such as greenhouse gases generated by industrial production of nitrogen oxides and carbon dioxide. If the atmosphere in the absence of such gases, the Earth will become too cold and not suitable for biological survival. In the atmosphere of greenhouse gases have a certain thing is only natural that some people believe that there is evidence that even in the absence of human impact, we will enter another ice age. But our concern is the face of the earth's greenhouse gases increasing so quickly has been a threat to life on Earth. Human activities have led to global warming, such as deforestation, which means that a reduction of carbon dioxide into oxygen, and the burning of fossil fuels lead to sea-level rise, Antarctic melting snow and ice temperature. Mean sea-level rise can be used to reduce the land area, melting the ice means that the release of any hazardous substances may also cause further sea-level rise. The increase in temperature of bacteria and viruses will also provide afavorable growth conditions, which would lead to more diseases.Furthermore, wherever we go today, we can find rubbish carelessly disposed. Pollution is, in fact, threatening our existence.然而全球气候越来越暖的最主要原因就是人类的日常活动，人们在生产的过程中产生大量气体如二氧化碳和氮气等气体。
如果大气中缺乏这种气体，地球会变得太冷从而破坏生物的生存。
在大气中有一定的温室气体是很自然的事情，有一些人认为，证据表明即使没有人类的影响我们也将进入另一个冰河时代。
但令人关注的是地球上的温室气体增加如此之快，已经严重威胁到了地球上的生物。
人类活动导致全球变暖的问题,如森林砍伐,这意味着减少二氧化碳转化为氧气,燃烧化石燃料导致海平面上升,南极大陆的融化的雪和冰的温度。
意味着海平面上升可以用来减少将冰融化的土地面积,意味着释放任何有害物质,也可能导致进一步的海平面上升。
温度升高的细菌和病毒还将提供一个良好的发育条件,从而导致更多的疾病。
另外，无论我们走到哪里，到处可见随意丢弃的垃圾。
事实上，污染正威胁我们的生存。
Now in some places of our country，a number of people have been cutting down the trees in the forests because they need wood and more farmland. The areas of forests are getting smaller and smaller. Some scientists say that there will be no vast forests in 20 or 30 years. It is really a terrible thing. Where the forests disappear，dust storms will occur occasionally. The weather will get hot and dry. The whole earth will become a big desert. A lot of plants and animals will disappear.Crops will not grow anywhere. Life will be difficult for everyone. The human beings will be punished for their forest-destroying activities.Therefore，we should realize the importance of taking care of our forests. We should do our best to protect our living environment and keep our mountainsgreen，the water clean，and the sky blue.在我国的一些地区，由于需要木材和得到更多的耕地，许多人一直在砍伐森林中的树木，森林面积正变得越来越小。
一些科学家预言二三十年后将不会再有大片的森林，这真的是一件可怕的事情。
森林在哪里消失，沙尘暴就在哪里发生，天气会变得炎热而干燥，整个地球会变成一个大沙漠，大量的动植物会消失，没有地方再长庄稼，生活会变得很艰难，人类因为破坏森林的活动将受到惩罚。
因此，我们应该认识到保护森林的重要性，尽最大努力保护我们的生存环境，保持山绿、水清、天蓝。
Harmony with the environment is that we live in on Earth, who is a natural son, and not only to natural persons as the conqueror, as we all know, there is only one earth and the mountains on Earth, the animals. Plant human cells, if it damaged, destroyed nature organizations, to the eradication of mankind. Therefore, the environment must be linked with social ethics, character education and practice acts as an important element of it.人与环境是和谐相处的，我们生存在地球上，人是自然之子，而不能仅把人看作自然的征服者，大家都知道，人类只有一个地球，地球上的山山水水、动物。
植物是人类的细胞，如果我们把它损坏了，破坏了大自然的组织，等于消灭人类。
因此，环境要与社会公德联系起来，与实践行为作为人格教育的一项重要内容来抓。
Keeping to the speed limit can help the environment. The more you speed the more petrol you are going to use, mak ing 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.保持速度限制可以帮助环境。