Dab tsi yog qhov laj thawj tseem ceeb ntawm desertification hauv Africa?
Dab tsi yog qhov laj thawj tseem ceeb ntawm desertification hauv Africa?

Video: Dab tsi yog qhov laj thawj tseem ceeb ntawm desertification hauv Africa?

Video: Dab tsi yog qhov laj thawj tseem ceeb ntawm desertification hauv Africa?
Video: Tuam Leej Kuab The Hmong Shaman Warior (Part 279) 23/2/2022 2024, Kaum ib hlis
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'Climatic variations' thiab 'Tib neeg kev ua ub no' tuaj yeem suav tias yog ob qho lub ntsiab ua rau desertification . tshem tawm cov nroj tsuag ntuj (los ntawm kev noj cov roj ntoo ntau dhau), kev ua liaj ua teb nyob rau hauv cov ecosystems yooj yim ntawm cov cheeb tsam arid thiab ib nrab arid, uas yog li strained tshaj lawv lub peev xwm.

Xav txog qhov no, dab tsi yog 3 lub ntsiab ua rau muaj suab puam hauv Africa?

Overgrazing yog qhov tseem ceeb ua rau desertification thoob ntiaj teb. Lwm yam uas ua rau desertification suav nrog kev tsim kho hauv nroog, kev hloov pauv huab cua, overdrafting ntawm cov av hauv av, deforestation, natural disasters thiab tillage xyaum ua liaj ua teb uas tso cov av yooj yim rau cua.

Tsis tas li ntawd, qhov twg desertification tshwm sim hauv Africa? Teb chaws Africa yog lub teb chaws feem ntau cuam tshuam los ntawm kev puam tsuaj , thiab ib qho ntawm cov ciam teb uas pom tseeb tshaj plaws ntawm thaj av yog sab qab teb ntawm Sahara suab puam. Cov teb chaws uas nyob ntawm ntug dej hiav txwv Sahara yog cov neeg pluag tshaj plaws nyob hauv lub ntiaj teb, thiab lawv raug kev kub ntxhov ib ntus uas ua rau lawv cov neeg puas tsuaj.

Dab tsi yog desertification hauv Africa?

Desertification yog, "dej degradation nyob rau hauv arid, semi-arid, thiab qhuav sub-humid qhov chaw tshwm sim los ntawm ntau yam, nrog rau kev hloov pauv huab cua thiab tib neeg kev ua ub no". Tsis suav nrog hauv cov ntsiab lus yog cov cheeb tsam uas muaj huab cua hyper-arid lossis huab cua ntub.

Dab tsi yog qhov laj thawj tseem ceeb ntawm kev ua suab puam hauv Sahel?

Desertification yog tshwm sim nyob rau hauv Sahel ib feem vim muaj dej nag txhua xyoo tab sis feem ntau yog vim muaj kev cuam tshuam los ntawm tib neeg kev ua ub no xws li overgrazing . Tsiaj txhu raug tso tseg rau graze ntawm ib feem ntawm thaj av tshem tawm feem ntau ntawm cov nroj tsuag thiab tawm hauv av raug thiab raug erosion.

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