The reasons for their species Special species and genetic failure, often leading to endangered species and even the underlying causes of extinction. Certain types of wild animals in the long-term evolution, adapted to a particular habitat and have had a special habits (including diet) to make it difficult to adapt to changes in the environment or other environmental and eventually end up "does not have been Out of "ending. Such as the giant panda into a special bamboo mainly for food, lose their existing habitat or a large area of bamboo flowering dead, no giant edible bamboo, a large number of inevitable death, appeared to survive the crisis. Some of the wildlife in the long-term evolution, for various reasons have been viability receded and the heritability of the threat of a recession, leading to its population and tend to be difficult to restore endangered 2), habitat destruction and loss Human deforestation for economic development, Wu Wai Wai Hai farmland, overgrazing, and so on, as a direct result of the loss of wildlife habitat, and indirectly led to the Endangered Species of Wild Animals. Forests and grasslands are wild animals, especially mammals, birds, insects, reptiles, as well as one of the most important habitats. Deforestation and land reclamation, followed by overgrazing and grassland, wild animals accounted for only inherent in their homes, wild animals will be divided into many small island-like stocks, making their survival of the race was very Great. � 4), environmental pollution Of this century, due to the pesticide, poison, chemical fertilizers, coal, oil, widely used to produce a large number of industrial "three wastes" and toxic substances, and serious pollution of the atmosphere, soil and water, wildlife damage to health, the growing low fecundity, Many rivers and lakes are no longer suitable for aquatic wildlife to survive and multiply. Some higher niche in the food chain because of wild animals also have been implicated in varying degrees.
沙漠化的原因 causes of desertification沙漠化通常是由于人类对环境的破坏而造成的,其中包括:过度放牧,过度耕植,过度樵采,不合理利用水资源以及工商业发展中对环境的破坏。Desertification is usually the result of destruction to the environment by human beings, including excessive grazing, cultivating,and cutting, as well as irrational use in water resource and the destruction while developing industry and commerce除人为原因,自然原因也对沙漠化起到了推动作用——气候异常,风导致的沙丘移动等。Except the factors created by men, innormal climat,the natural factor, has motivated the desertification because the wind makes the dune move and so on而要治理沙漠化,就要对这些问题一一的加以处理。And to control the desertification, all these problems shold be solved one by one
Causes of DesertificationDesertification is usually caused by human's destruction to the environment which includes:overgrazing,excessive lumbering,unreasonable use of water resources and the development of commerce and industrial. Except for human's activities,natural factors also have a pushing effect on desertification----climatic anomaly,travelling dune caused by wind,ect.However,to control desertification,we need to solve those problems step by step
2008,一个再普通不过的数字,但是,一提到它,会让多少中国人热血沸腾!一个数字怎么会有如此大的魔力?答案是简单而神圣的,在这一年里,北京将举办第29届奥林匹克运动会,那时,世界的目光将齐聚北京,而北京,也将以主人的身份,展现她最美丽的风采!2008, but a more general figures, however, a reference to it, how much will the Chinese people blood boiling! There will be a figure how such a large magic » The answer is simple and sacred, in the year, Beijing will hold the 29th session of the Olympic Games, then, the world's attention will gather in Beijing, and Beijing, will also be the identity of the owner, show her the most beautiful charisma! 2008,北京的奥运将是一届绿色的奥运、科技的奥运、人文的奥运。其中,"绿色奥运"是三个最重要的理念之一。这充分表现出我们要办好一届环保奥运的决心和信心!然而,要实现这一目标,我们要走的路还十分艰辛。 2008, the Beijing Olympic Games will be a green Olympics, the Olympic technology, humanities Olympics. Among them, "Green Olympics" are the three most important concepts of. This has fully demonstrated we want to host the Olympic Games of the environmental determination and confidence! However, to achieve this goal, we have a very difficult road still. 我想,作为一名中学生,我们更有责任,也更有义务积极地投入到环保行动中。我们的一举手,一投足,都会给市容环境带来影响。因此,我们要从我做起,从身边做起,从小事做起,努力为北京争光添彩。那么,怎样才能从小事做起呢? think that as a secondary school students , we have more responsibility and more active duty into environmental action. We have a show of hands, a Touzu, will be brought to the city environmental impact. Therefore, we must start with me, starting from the side, from small start, and add luster to win glory for Beijing. So, how can we start from the trivial?其实生活中我们能做得也有很多。近年来沙尘暴肆虐北京,大家一定都有体会。过度放牧和采伐森林使土地沙漠化,虽然我们无力使所有退化土地重新成为绿洲,但至少我们可以在我们的学校植树,在我们的小区植树,如果人人都能行动起来,北京将成为绿色的北京,2008将成为绿色的奥运。 In fact, we can do in life there are many. Beijing dust storms wreaked havoc in recent years, we have some experience. Overgrazing and deforestation of land desertification, although all of our inability to again become the oasis of degraded land, but at least we can in our school tree planting, planting trees in our area, if everyone can take action, Beijing will be green The Beijing 2008 Olympic Games will become green.看看哪些你重点需要加以取舍