BBC.地平线.2020.从七十七亿人口开始

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  • AccordingtotheUN,itispredictedthatthehumanpopulati… AccordingtotheUN,itispredictedthatthehumanpopulationcouldreachtenbillionpeoplebytheyear2050.ForbroadcasterandnaturalistChrisPackham,whohasdedicatedhislifetochampioningthenaturalworld,thesubjectofourgrowingpopulationandtheimpactitishavingonourplanetisoneofthemostvital–andoftenoverlooked–topicsofdiscussioninaneraofincreasingenvironmentalawareness. Chrisisworriedthataworldoftenbillionmaysimplybetoomanypeoplefortheearthtosustain,giventheimpact7.7billionhumansarealreadyhaving.Travellingaroundtheglobeinsearchofanswerstodifficultandsometimescontroversialquestions,Chrisinvestigateswhyourpopulationisgrowingsorapidly,whatimpactitishavingonthenaturalworld,andwhetherthereisanythingthatcanbedone. ChristravelstoBraziltodiscoveramegacityonthevergeofrunningoutofwaterandanindustryexpandingtofeedourgrowingnumbers–withdireconsequencesforbiodiversity.InNigeria,acountrysettobecomethethirdmostpopulousnationonearthby2050,overtakingtheUnitedStates,Chrisvisitsanextraordinarycommunitysurvivingagainsttheoddsandaschoolthatmightholdtheanswertoafuturefallinthebirthrate.BackhomeinBritain,ChrisinterviewsSirDavidAttenborough–likeChris,heisapatronofthecharityPopulationMatters.Chrisalsoexaminestheroleoffallingbirthratesaroundtheworld,theimpactofanagingpopulation,andmeetsacouplewhoarestrugglingtogetpregnantthroughIVF. Withinterviewsfromseveralpopulationexperts,Chris’sfocusultimatelyturnstotheimpactourlevelsofconsumptionarealreadyhaving,andaskswhethertheworldcanrebalancetoaccommodatetheneedsofovertwobillionmorepeople.