文档介绍:of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of ton facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, plete with warning signs, isolating network protection facilities3
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, plete with warning signs, isolating network protection facilities
也许,你住在高耸的“水泥森林”之中,迎旭日升腾,看车流驶入人海,紧X的学****应试和生活合奏着“交响乐章”。
也许,每个人都有着不尽相同的生活和环境,但谁都离不开自然和社会环境。每当我们讲起环境科学,则往往都是“不讲不知道,讲了吓一跳”。
也许,你在感叹之余,会同我们一样因此而关心环境、关心环境科学,为使我们国家和全人类为实现清洁文明而充满活力的乐土而共同奋斗。
?(环境的破坏和污染)
最新研究表明:
全球地表平均温度(年均),近50年来的升温率几乎是上世纪五十年代以前的100倍;
预测按现温室气体增速,100年后(2100年后)~;1970~2004年34年间全球温室气体排放量净增70%。其原因主要是人口数量和人均能源消耗量增大所至。
据中国中央气象局报:
1908~2007年(近百年)。自1986年以来,中国连续经历了21个暖冬,后果:,加大了洪涝威胁;,自然生态系统退化,生物多样性减少,西北冰川和高山冰川锐减,冰川和积雪融化又导致绿洲及山下生态系统受到威胁;全国农业生产不稳定性增加,气象灾害变频致农牧业受损增大。未来气象变化对中国的影响以负面影响为主;中国将成为受气候变化不利影响最严重的国家之一。
:(按几何空间尺度分)
(1)大环境:五大圈层说,大气圈、水圈、岩石圈、土壤圈、生物圈
(2)中环境:地域或区域性环境、全流域、城市、乡、镇、湖泊等
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, plete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, plete with warning signs, isolating network protection facilities15
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, plete with warning signs, isolating network protection facilities
(3)小环境:一个池塘、一个河段、城乡局部、一个群落、一个聚落等
(4)微环境:一个机体、一群细胞
(1)自然自身的污染与破坏
(2)有人类之后愈演愈