JUST
发表于 2025-3-23 09:46:02
Geological and Geographic Setting) Although the rocks are old, the rugged landscape is young and dominated by rocky hills and ridges, rounded and scoured by glaciers. Lakes and rivers are plentiful and often lie in fractures or weak zones in the bedrock that were more easily eroded by the moving ice. A generally thin veneer of sand
ODIUM
发表于 2025-3-23 14:22:31
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A精确的
发表于 2025-3-23 19:00:27
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极为愤怒
发表于 2025-3-24 00:43:05
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1分开
发表于 2025-3-24 04:24:37
Lake Water Quality Improvements and Recovering Aquatic Communitiesrs but is no less severe. These hilly forested areas, underlain by granitic bedrock (Fig. 5.1), contain most of the more than 7000 lakes estimated to have been damaged by smelter emissions (see Fig. 3.2).
goodwill
发表于 2025-3-24 07:41:50
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供过于求
发表于 2025-3-24 13:54:41
Natural Recovery of Vascular Plant Communities on the Industrial Barrens of the Sudbury Areamission cutbacks came into effect. This led to expectations of rapid reestablishment of vegetation on the barrens, because it was widely believed that sulfur dioxide fumigation was the main factor directly impeding vegetation recovery. It was observed, however, that immediate recovery in the barren
OASIS
发表于 2025-3-24 18:22:54
Municipal Land Restoration Program: The Regreening Process are relatively few examples in which the communities have been effective at reducing or eliminating these problems. Sudbury’s land reclamation and air pollution reduction program, Los Angeles’s (Leuts and Kelly 1993) and Tokyo’s (Nishimura 1989) smog reduction programs, the cleaning of the Thames R
intolerance
发表于 2025-3-24 19:00:09
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雄辩
发表于 2025-3-25 01:01:45
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