The Earth does not have an inexhaustible supply of resources, so every effort should be made to conserve resources and limit the impact of human activity on the planet.

地球上的资源并不是取之不尽、用之不竭的，所以我们应该尽全力保存资源，限制人类活动对地球的冲击。

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Others study the impact of human activity on Earth's environment and design methods to protect the planet.

另一些地球学家则研究人类活动对地球环境的影响，并制订出保护地球的措施。

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In modern society, the environmental impact of infiltration in the various fields of human activity and all aspects of human life.

在现代社会中，环境影响渗透于人类活动的各个领域和人类生活的各个方面。

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The draft curriculum for geography does not contain references to climate change but a section called "Earth science" in the chemistry syllabus says 11- to 14-year-olds should be taught about "the production of carbon dioxide by human activity and the impact on climate" and includes a section on "the efficacy of recycling".

BBC: Keep climate change lessons in curriculum, urge petitions

The IPCC Panel's near-consensus was that human activity is having some discernible impact on climate, and that by 2100, a warming earth could result in more frequent storms and droughts, sea level rise of up to three feet, and up to six degrees F. in temperature rise.

CNN: Selected Web sites on climate change

Across all of Africa the impact of human activity is clear - whether in the newly irrigated areas created by the waters of the Nile, turning huge areas of the desert around Egypt's lake Nasser green, or the urban sprawl of Dakar, across the Cap Vert peninsula in Senegal.

BBC: Atlas shows vanishing landscape