Protection of EnvironmentThere are still many problems of environmental protection in recent One of the most serious problems is the serious pollution of air， water and the polluted air does great harm to people’s The polluted water causes diseases and What is more， vegetation had been greatly reduced with the rapid growth of modern To protect the environment， governments of many countries have done a Legislative steps have been introduced to control air pollution， to protect the forest and sea resources and to stop any environmental Therefore， governments are playing the most important role in the environmental protection In my opinion， to protect environment， the government must take even more concrete First， it should let people fully realize the importance of environmental protection through Second， much more efforts should be made to put the population planning policy into practice， because more people means more people means more Finally， those who destroy the environment intentionally should be severely We should let them know that destroying environment means destroying mankind 保护环境目前环保还存在着许多问题。最严重的问题就是空气、水和土壤的严重污染。污染的空气对人类的健康十分有害。污染的水引起疼病，造成死亡。更有甚者，随着现代社会的迅速扩建，植被大大的减少。为了保护环境，各国政府做了大量的工作。采用了立法措施控制大气污染，保护森林资源和海洋资源，制止任何环境污染。因此，在当今的环保中政府起着最重要的作用。我的看法是，为了保护环境，政府应当采取更具体的措施。首先，应当通过教育的方法使人们充分謒到环境保护的重要性。第二，应更加努力把计划生育政策付诸实施，因为人口多就意味着污染严重。最后，要严惩那些故意破坏环境者。使他们破坏环境就是毁灭人类自己。
Water pollutionWater pollution is a major problem in the global It has been suggested that it is the leading worldwide cause of deaths and diseases， and that it accounts for the deaths of more than 14，000 people An estimated 700 million Indians have no access to a proper toilet， and 1，000 Indian children die of diarrheal sickness every Some 90% of China's cities suffer from some degree of water pollution， and nearly 500 million people lack access to safe drinking In addition to the acute problems of water pollution in developing countries， industrialized countries continue to struggle with pollution problems as In the most recent national report on water quality in the United States， 45 percent of assessed stream miles， 47 percent of assessed lake acres， and 32 percent of assessed bay and estuarine square miles were classified as pollutedWater is typically referred to as polluted when it is impaired by anthropogenic contaminants and either does not support a human use， like serving as drinking water， and/or undergoes a marked shift in its ability to support its constituent biotic communities， such as Natural phenomena such as volcanoes， algae blooms， storms， and earthquakes also cause major changes in water quality and the ecological status of Causes of water pollutionThe specific contaminants leading to pollution in water include a wide spectrum of chemicals， pathogens， and physical or sensory changes such as elevated temperature and While many of the chemicals and substances that are regulated may be naturally occurring (calcium， sodium， iron， manganese， ) the concentration is often the key in determining what is a natural component of water， and what is a Oxygen-depleting substances may be natural materials， such as plant matter ( leaves and grass) as well as man-made Other natural and anthropogenic substances may cause turbidity (cloudiness) which blocks light and disrupts plant growth， and clogs the gills of some fish Many of the chemical substances are Pathogens can produce waterborne diseases in either human or animal Alteration of water's physical chemistry includes acidity (change in pH)， electrical conductivity， temperature， and Eutrophication is an increase in the concentration of chemical nutrients in an ecosystem to an extent that increases in the primary productivity of the Depending on the degree of eutrophication， subsequent negative environmental effects such as anoxia (oxygen depletion) and severe reductions in water quality may occur， affecting fish and other animal
