青藏铁路--世界上海拔最高的"环保铁路"

青藏铁路因穿越生态环境十分脆弱的青藏高原而受到世人的广泛关注。如何呵护雪域高原这方净土,是青藏铁路建设者们面临的一个崭新课题。本文通过青藏铁路在建设过程中实施的“环保”方案,以及建设者们付出的艰辛劳动。以唤起人类对生态环境的重视,为我们还留有这方净土而欣喜。     

世界水日

1993年1月18日，第四十七届联合国大会将每年的3月22日定为“世界水日”。到今年为止，“世界水日”已经走过12个春秋，2005年3月22日第13个世界水日的主题为“生命之水”。更是凸现了“水，是生命之源”这一永恒的真理。这些作品从不同角度诠释了人与水之关系的多样性与丰富性，反映和展望了中国水环境及其危机。由联合国开发计划署、国际水协、清水同盟、自然之友等单位发起并主办的“中国——人与水”摄影大赛通过摄影镜头捕捉人与水，人与自然和谐相处的美好瞬间，反映人们科学用水、保护水资源，防止水污染的努力，从而提高公众对水与健康、水与环境及水与经济可持续发展的认识。本期“环保娱”选取了此次摄影大赛的部分作品予以刊登。     

开的不是“车”，是“观念”

素有“自行车王国”之称的中国,头上这顶“王国”的冠冕今天似乎渐有被人剥夺的趋势。跟我们争夺这项冠冕的,不是比我们更买不起汽车的穷国,而是西欧富豪荷兰。     

攀岩 在岩壁上起舞

攀岩,近几年流行于我国各地的一项时尚健身运动方式。攀岩爱好者们如壁虎一般在攀岩墙上腾挪前行,有人形容他们是在“岩壁上起舞”。近期本刊记者采访了几位攀岩爱好者,从他们的故事中我们看见只要有足够的勇气,你也可以登上攀岩墙的顶端。     

我国第一套世界地球日纪念邮票首发

今年的4月22日是第36个世界地球日，国土资源部等单位举办了以“善待地球”为主题的宣传活动，并与国家邮政总局共同举办了我国首套“世界地球日”纪念邮票首发式。记在首发仪式上看到，这枚邮票的图稿是一双捧托姿势的手势来表现“世界地球日”的主题，     

现有水世界

上善若水。浩浩河流是大地的血管,潺潺流水是生命的血液。然而,全球在很大程度上陷入了水危机中,人类水世界,谁人敢乐观？今年3月22日,第19个“世界水日”,联合国确定的宣传主题是“城市用水：应对都市化挑战”;自此一周,是第24届“中国水周”,活动主题为“严格管理水资源,推进水利新跨越”。     

认识地球 和谐发展——第39个世界地球日

4月22日,是第39个“世界地球日”。值此纪念活动,编辑此版,向大家提醒地球日趋严重的生态危机,宣传普及相关地球知识,目的在于呼吁大家行动起来,善待地球、保护资源环境,走和谐发展的道路,更加珍爱这个我们繁衍生息的星球,珍爱我们共同的家园。     

难忘的“绿色”行动

今天,我们学校举行了主题为“绿旗飘飘在行动,节水护绿我能行”的“国际生态学校绿旗升旗启动仪式暨世界水日”活动。     

冬泳 勇敢者的运动

冬泳被称为＂勇敢者的运动＂,寒冬时节,人们用棉衣将身体裹得严严实实,而冬泳爱好者们却勇敢地跳进水里,挑战寒冷的天气、挑战自我。有人认为冬泳爱好者是逞强、＂傻帽＂,冬泳爱好者们却乐此不彼,沉浸在冬泳给他们带来的快乐当中。     

“绿色”的世界，让我来装扮

在充满动感的音乐声中,芜湖市镜湖小学的孩子们身着废旧材料制成的环保服装闪亮登场了,举手投足中流露出了他们的天真、可爱;流露出他们对大自然的热爱以及他们保护地球家园的美好愿望。这是日前在芜湖市举办的首届校园环保时装秀比赛中的精彩画面,小模特们身着的这一件件制作精良、构思巧妙的环保服装全是小模特、家长和老师们用心构思设计制作的,在制作的过程中学生们通过每一个细节体现出节约能源的环保理念。环保时装秀活动促进了学生良好的行为习惯和环保意识的养成。     

鸟的世界

今天，钢筋混凝土造就的高楼大夏已经成为城市的主要风景。我们呼吸着污染的空气，夹杂在拥挤的人流中，机械地穿梭于坚硬而冷漠的建筑群之间。曾经那欢漫在大地上的泥土气息、野花的芬芳和小乌欢快的啾鸣声，已经离我们越来越远。乌类们那动人心魄的歌喉和优美的舞姿，只能黯然地储藏在记忆里。然而心底又底总会不经意地泛起一种淡淡的怀念之情。带头对乌类世界的好奇和探索，我们走进这片充满诱惑的领地，去探访这些可亲可近的朋友。     

The World Bank and Petroleum Development in the Third World

The issues that arise between state sovereignty over natural resources and the desire of the State to finance the development of its petroleum resources from external sources are briefly examined. The problem is particularly acute for the least developed countries. It is suggested that financing obtained from international agencies such as the World Bank, may provide a means for such countries to maintain full sovereignty over their petroleum resources and at the same time obtain needed financing. To this end the petroleum lending activities of the World Bank are examined both in terms of policy and in terms of the financial resources available. A special lending facility to help underwrite financial risk of petroleum exploration in the least developed countries is proposed.     

World phosphate supply

The Bureau of Mines investigated the resources, costs, capacities, market relationships, and short- and long-run supply of phosphate rock and phosphoric acid. The 206 mines and deposits evaluated in 30 market economy countries (MECs) contain an estimated 35.1 billion tonnes of recoverable phosphate rock (demonstrated resource level). US resources are sufficient to satisfy both the domestic market and an export market for phosphate products well beyond 2000. Resource depletion at current producers, however, means new property development (with higher costs) will be required if US production levels are to be maintained. Existing worldwide capacity can satisfy expected demand through the early 1990s. Expansion at existing mines or low demand growth could mean no new property development is required before the late 1990s. Worldwide, almost $8 billion could be required for the development of new phosphate rock properties between now and 2000, given 3% annual growth in demand. Though profit may not be the principal motivation for development of government-owned operations, most properties that could develop in the 1990s would require price increases of 20–50% to break even. To earn a 15% rate of return on investment, prices must rise to nearly double the $23–271 tonne US price level of 1988. Current US phosphate rock and phosphoric acid producers appear to be competitive (on a variable cost basis) with many other suppliers in major markets. New US properties will have higher variable costs than current producers; however, they are competitive with most projected new foreign development. The US phosphoric acid industry will most likely face increased competition as more of the foreign phosphate rock producers develop the capacity to process rock into phosphoric acid and other fertilizer products.     

World Oil Market

The structure of the world oil market in the 1980s is briefly examined. The oil market is characterized by asymmetry with a small number of oil exporting countries and a considerably larger number of oil importing countries. This asymmetry makes synchronization between supply and demand difficult. The result is that periods of scarcity and glut alternate and there are therefore opportunities for both increases and decreases in the real price of oil. The behaviour of the world oil market is analysed within the framework of conventional market, cyclical and dynamic structural theory. The consensus is that a major increase in the price of oil can be expected before the end of the current decade.     

中国世界遗产数量特征定量分析

以中国37处世界遗产为研究对象,利用统计分析法、比较分析法等对中国世界遗产的数量、空间分布和发展情况进行了分析.结果表明,中国世界遗产分布不均,主要分布在东部和中部地区,而西部地区世界遗产稀少;世界遗产总体发展速度较慢,其中北京、四川等省份发展速度相对较快.