...(1) It must be sufficiently concentrated in a natural state, (2) there must be a sufficient amount, and (3) it must be in a location within reach. If it lacks any of these three elements, it is not suitable to be called a resource. For example, if we focus only on the amount, the simple idea that seawater is a large resource that contains almost every substance, and that it is in large quantities and right in front of us, is unrealistic because it would be too expensive to extract anything other than these substances, even though the salt in the water itself is sufficiently concentrated. If we were to extract gold from seawater, we would have to chemically treat a huge amount of seawater, which is simply not profitable with the current level of technology. *Some of the terminology used in relation to "seawater resources theory" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…(1)自然の状態で,十分に〈濃集〉していること,(2)十分な〈量〉があること,(3)手の届く〈位置〉にあることで,以上の3要素のいずれを欠いていてもそれは資源と呼ぶにふさわしくない。たとえば〈量〉のみに注目をして海水は大きな資源でほとんどあらゆる物質を含んでおり,しかも量も大きく目の前にあるといった単純な海水資源論は,水そのものの塩分などは十分に〈濃集〉されているが,これらの物質以外を抽出するとすれば費用がかかりすぎ現実的でない。かりに海水から金を採るとすれば膨大な海水を化学的に処理しなければならず,現在の技術水準ではとても採算に合わない。… ※「海水資源論」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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