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Planetary civilization, or global civilization is a civilization of Type I on Kardashev scale, with energy consumption level near contemporary terrestrial civilization with an energy capability equivalent to the solar insolation on Earth, (between 1016 and 1017 watts). In social aspect — the worldwide, global, increasingly interconnected, international, highly technological society. ==Planetary civilization — Type I civilization on Kardashev scale== (詳細はSoviet astronomer Nikolai Kardashev in a work "Transmission of Information by Extraterrestrial Civilizations", published in 1964, proposed the scale of technological development of civilization, based on the amount of energy that civilization is able to utilize, then named Kardashev scale. A Type I civilization is planetary, consuming the sliver of sunlight that falls on their planet, or about 1017 watts. A Type II civilization is stellar, consuming all the energy that their star emits, or 1027 watts. A type III civilization is galactic, consuming the energy of billions of stars, or about 1037 watts. Carl Sagan suggested defining intermediate values (not considered in Kardashev's original scale) by interpolating and extrapolating, according to his calculations, the modern state of the present human civilization is expressed by a value about 0.7. 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「Planetary civilization」の詳細全文を読む スポンサード リンク
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