Resource-saving technologies

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Presentation transcript:

Resource-saving technologies 경제학과 200931106 차미연

Nitrogen Beginning of the 20th century was a shortage of nitrogen, a vital input plant growth. German chemist, Fritz Haber(1909), Solved the problem of nitrogen fixation -first synthetic chemical fertilizer.

Japanese attack on Pearl Harbor in 1941 Rubber U.S. rubber = Natural rubber(1941) The U.S. government organized a crash scientific program to develop synthetic rubber. By 1945, U.S. rubber 85% of the rubber consumed was synthetic. Japanese attack on Pearl Harbor in 1941

Nuclear Fusion Nuclear Fusion, the reaction that powers the sun and also the hydrogen bomb. The advantages of fusion Limitless supply global warming won`t affected Long-lived nuclear waste won`t produced

Solar Energy Sunlight is Plentiful, clean, and cheap. In the past, the price was high, but not now.($50→$3 per watt) The price of electricity produced from photovoltaics will fall below the price of electricity from burning coal around the year 2030.

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