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 「地球」と「環境」

地球温暖化

The average surface temperature of the Earth has been kept at around 15°C by greenhouse gases, such as CO2 and methane, for a substantial period of time. Now this atmospheric balance is falling out of order, raising concerns about global warming. Even slight increases in the average temperature can significantly affect the Earth's ecosystem. To help preserve our natural environment for the next generations, we need to create recycling-oriented societies and do what we can to prevent global warming.

大気のはたらきと気温のしくみ

気温のしくみ・図 The Earth is heated by radiation from the sun which is transformed into infrared light and is released into space through the atmosphere. Part of the energy however, is kept in the atmosphere by greenhouse gases thus maintains an adequate temperature for living things on the Earth. Those gases, maintaining an adequate temperature for living things on Earth. Gases that keep in infrared rays are called "greenhouse gases."

地球温暖化の原因

大気中の温室効果ガスの温暖化への 影響の割合

Increasing concentration of greenhouse gases cause an increase in average surface temperature. Such greenhouse gases, 80% of which consists of CO2 and methane, are from daily industrial and human activities.

 

温室効果ガス(CO2)の濃度と量の推移

地球の炭素循環

Carbon dioxide is produced by living organisms and emitted by industrial activities. After being released through photosynthesis, the gas circulates among air, soil, and sea water on the Earth. This carbon cycle of the Earth's climate system maintains concentrations of CO2 in the atmosphere to a certain level, stabilizing the temperature of the Earth.

地球温暖化とは

However, the average surface temperature of the Earth has risen by 0.74℃ over the past 100 years. In Japan, the increase has been above the average: 1.1℃. If average temperature increases by 1℃, the climate in Tokyo will become identical to that of Miyazaki in southern Japan.

地球温暖化の影響

Global warming has various negative impacts on our lives, such as the destruction of earth's ecosystem, frequent climatic anomalies, elevation of water levels, and other events that can cause us to lose our homes, suffer food shortages, and face challenges to our survival.

地球温暖化を防ぐために

低炭素社会の実現に向けて
To prevent global warming it is indispensable to achieve a low-carbon society that reduces emissions of greenhouse gases, including CO2. We need to reexamine our ways of living, which currently is destroying earth's natural environment and requires consuming large amounts of energy for production. We need to think about what we can do such as reusing or recycling.

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