Ten-nen shigen refers to natural resources that are found in the earth's crust and have not been created by humans.
Shokubutsu seibutsu (植物性物質): Plant-based materials. Some examples of ten-nen shigen include wood, cotton, and rubber which are derived from plants.
Chikyū hatsuden (地球発電): Geothermal power generation. Ten-nen shigen like heat from the Earth's core can be used to generate electricity through chikyū hatsuden.
Chishitsu kagaku (地質化学): Geochemistry. The study of the chemical composition of rocks and minerals helps us understand more about ten-nen shigen.
AP Japanese - Unit 6 Overview: Environmental, Political, and Societal Challenges
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