未来的水资源问题
1.水资源问题将来会更严峻;
2.解决水资源问题的办法。
[范文]
Presently, the world is faced with serious water problems. But these problems witt become more intense and more complex in the future. Our increasing population witt tremendously increase urban waters, primarily sewage. On the other hand, increasing demands for water witt decrease substantially the amount of water available for diluting wastes. Rapidly expanding industries which involve more and more complex chemical processes will produce large volumes of liquid wastes. Many of thesewitt contain chemicals that are poisonous. To feed our rapidly expanding population, agriculture will have to be intensified. This will involve ever increasing quantities of agriculture chemicals. From this, it is apparent that drastic steps must be taken immediately to develop corrective measures for the pollution problems.
There are two ways by which these pollution problems can be lessened. The first relates to the treatment of wastes to decrease their pollution hazard. This involves the processing of solid wastes prior to disposal and the treatment of liquid wastes to permit the reuse to the water or best reduce pollution upon final disposal. The second approach is to develop an economic use for all or part of the wastes. Farm manure is spread in fields as a nutrient. Wastes from sewage disposal plants are used in some areas both for irrigation and for the nutrients contained. Liquid wastes from other processing plants may also be used as a supplemental source of water. Only by doing these promptly now can we expect to solve the serious water problems in the future.
2014中考英语作文热点话题:我的理想职业
中考英语作文拿高分的秘诀是什么
2014中考英语作文热点话题:学做好人好事
2014年云南昆明中考英语作文范文:二选一
2014年湖北武汉中考英语作文题目:农场实践
2014年湖北武汉中考英语作文范文:摘蔬菜
好习惯使人保持健康
在青年旅馆的一天
读书是个好习惯
2014年全国各地中考作文题目汇总(更新中……)
2014年黑龙江中考英语作文题目:二选一
2014中考英语作文热点话题:低碳生活
2014年广西来宾中考英语作文范文:创建文明校园
我心目中的英雄
中考英语作文乡村生活与都市生活
2014中考英语作文热点话题:饮食安全
2014年贵州安顺中考英语作文范文:我的理想
宠物和人
2014中考英语作文热点话题:怎样学好英语
我的兴趣
中考英语作文范文 孩子教育的方法
我的十二岁生日
2014年福建漳州中考英语作文范文:学生睡眠
2014中考英语作文热点话题:节约用水
2014年湖北十堰中考英语作文范文:勤俭节约
参观博物馆
2014年甘肃白银中考英语作文范文:时间去哪儿了
一次可怕的经历
我的偶像
我们的花园
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |