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¡¡¡¡Ô­ÎÄ: In the last 20 years, scientists have detected an increasing variety of toxic contaminants in the North, including pesticides from agriculture, chemicals and heavy metals from industry, and even radioactive fall-out from Chernobyl. These are substances that have invaded ecosystems virtually worldwide, but they are especially worrisome in the Arctic.
¡¡¡¡ÌâÄ¿: Industry in the Arctic has increased over the last 20 years.
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¡¡¡¡µÚÒ»²½£ºÈ·¶¨ÌâÄ¿ÖеĶ¨Î»´Ê¡£¶¨Î»´Ê·Ö±ðÊÇʱ¼ä±í´ïʽover the last 20 years£¬×¨ÓÐÃû´ÊArcticºÍÖ÷ÓïIndustry.ÁíÍ⣬¿¼µã´ÊÊÇincreased.
¡¡¡¡µÚ¶þ²½£º¶¨Î»´Êµ½Ô­ÎÄÖж¨Î»¡£ÎÄÕÂÔ­¾äÊÇ: In the last 20 years, scientists have detected an increasing variety of toxic contaminants in the North, including pesticides from agriculture, chemicals and heavy metals from industry, ÎÒÃÇ·¢ÏÖÔÚÔ­ÎÄÖеÄʱ¼ä¶ÔÓ¦´ÊºÍÌâÄ¿ÖеÄÏàͬ£¬¶øArcticÔÚÔ­ÎÄÖÐҲûÓб仯¡£¶ø¿¼µã´ÊÔÚÔ­ÎÄÖÐת»¯³ÉÁËincreasing.Ô­ÎĵıíÊöÊÇ an increasing variety of toxic contaminants£¬ËµÃ÷Ôö¼ÓµÄÊÇvariety of toxic contaminants£¬¶øÌâÄ¿ÖеÄÖ÷ÓïÊÇIndustry.¶øindustryÔÚÎÄÕÂÖеıíÊöÊÇ¡­¡­heavy metals from industry.µ«Õâ²¢²»ÄÜÅжϹ¤ÒµÊÇ·ñÔö³¤¡£ËùÒÔ±¾ÌâÅжÏΪnot given.
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¡¡¡¡Ô­ÎÄ: Scientists have found that a smoked substance reaches the brain more quickly than one swallowed, snorted £¨such as cocaine powder£© or even injected.
¡¡¡¡ÌâÄ¿: Snorted substances reach the brain faster than injected substances.
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¡¡¡¡ÌâÄ¿ÖбȽϵÄÁ½·½ÃæÊÇSnorted substancesºÍinjected substances.¶øÔ­ÎĵıȽÏÄÚÈÝÊÇa smoked substanceºÍswallowed, snorted £¨such as cocaine powder£© or even injected.ÌâÄ¿ÖеıȽ϶ÔÏóÔÚÔ­ÎÄÖÐÊDz¢ÁйØϵ£¬Òò´ËÎÞ·¨½øÐбȽÏ£¬ËùÒÔ´ð°¸ÅжÏΪnot given.
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¡¡¡¡Ô­ÎÄ: Nearly half the world's population will experience critical water shortages by 2025, according to the United Nations £¨UN£©. Wars over access to water are a rising possibility in this century and the main conflicts in Africa during the next 25 years could be over this most precious of commodities, as countries fight for access to scarce resources.
¡¡¡¡ÌâÄ¿: Some African countries are currently at war over water resources.
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¡¡¡¡ÌâÄ¿Öж¨Î»´ÊAfrican countries£¬war£¬waterÔÚÔ­ÎÄÖж¼¿ÉÒÔ¶¨Î»ÏàÓ¦µÄ´Ê»ã¡£ µ«ÊÇÌâÄ¿ÖеĹؼü´ÊÊÇcurrently£¬¶øÔÚÎÄÕÂÖеıíÊöÊÇ¡­¡­during the next 25 years could be¡­¡­¡£ÏÖÔںͽ«À´µÄÁ½ÖÖ״̬ÎÞ·¨½øÐбȽÏ¡£ËùÒÔ´ð°¸ÅжÏΪnot given.
¡¡¡¡¢ø. Ô­ÎÄÖÐÓбíʾ¼«¶ËµÄÐÞÊδÊÈçmost, all, anyµÈ£¬¶øÔÚÎÄÕÂÖÐÎÞ·¨ËÑË÷µ½Ïà¹ØµÄͬÒå±íÊö£¬Ôò´ð°¸ÅжÏΪNot Given.
¡¡¡¡Ô­ÎÄ: Hydroelectric power is at present the earth's chief renewable electricity source, generating 6% of global energy and about 15% of worldwide electricity. Hydroelectric power in Canada is plentiful and provides 60% of their electrical requirements. Usually regarded as an inexpensive and clean source of electricity, most big hydroelectric projects being planned today are facing a great deal of hostility from environmental groups and local people.
¡¡¡¡ÌâÄ¿: Canada uses the most hydroelectric power in the world today.
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¡¡¡¡Í¨¹ýÌâÄ¿ÖеÄÁ½¸öרÓÐÃû´ÊCanadaºÍhydroelectric power¶¨Î»¡£Ô­ÎÄÌáµ½ÁËHydroelectric power in Canada is plentiful and provides 60% of their electrical requirements. µ«ÊDz¢Ã»ÓÐ˵µ½most¡­¡­in the world today.´ÓÉÏÏÂÎĵĹØϵÀ´¿´ÎÄÕÂÖÐÌáµ½µÄmost big hydroelectric projects being planned today are facing a great deal of hostility from environmental groups and local peopleÒ²ÓëÌâÄ¿µÄ±íÊöÎ޹ء­¡­ËùÒÔ´ð°¸ÅжÏΪnot given.