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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Environment of California ： ウィキペディア英語版 Environment of California The environment of California describes results of human habitation of the State of California. ==History of environmental action== California's Mediterranean climate makes vegetation susceptible to wildfires through the dry summers. Aboriginal Californians used fire to control brush, promote growth of seed-producing plants important to subsistence, and perhaps as an aid to hunting wildlife. These periodic fires kept woodland areas relatively open until 20th century laws curtailed burning in an effort to protect structures.〔Heizer, Robert F. ''Handbook of North American Indians, volume 8, California'' (1978) Smithsonian Institution pp.22-23〕 European crops and livestock were introduced with missions along the coast from San Diego to San Francisco Bay through the late 18th and early 19th century. The California Gold Rush caused explosive population growth making San Francisco the only 19th century city west of St. Louis, Missouri.〔Donley, Allan, Caro, and Patton ''Atlas of California'' (1979) ISBN 0-9602544-0-4 pp.9-19〕 Water soon became the limiting factor for population growth, and early laws established water rights for irrigation and hydraulic mining. The Great Flood of 1862 washed gravel displaced by gold mining downstream to cover riparian cropland and fill formerly navigable stream channels serving as transportation corridors to San Francisco Bay. The damage encouraged passage of water pollution control legislation broadly regulating disposal of waste to include relatively innocuous materials like gravel.〔(【引用サイトリンク】title=THE GREAT CALIFORNIA FLOOD OF 1862 )〕 These California laws provided a template for the United States Environmental Protection Agency National Pollutant Discharge Elimination System. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Environment of California」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.