Qhov twg desertification tshwm sim hauv Africa?

Cov txheej txheem:

Qhov twg desertification tshwm sim hauv Africa?
Qhov twg desertification tshwm sim hauv Africa?
Anonim

Desertification nyob rau hauv teb chaws Africa Tshwj xeeb tshaj yog, suab puam plays nws lub luag hauj lwm loj tshaj plaws nyob rau hauv grasslands ntawm East Africa, lub Kalahari suab puam thiab lub Sahara suab puam. Cov cheeb tsam no nthuav dav dua 65 feem pua ntawm thaj av. Hauv Ethiopia, 80 feem pua ntawm thaj av muaj kev pheej hmoo ntawm kev muaj suab puam.

thaj chaw twg hauv Africa puas muaj kev nyuaj siab tshaj plaws tshwm sim?

Lub tebchaws United Nations kwv yees kwv yees li 30 lab acres ntawm thaj av thoob plaws ntiaj teb raug cuam tshuam los ntawm cov suab puam txhua xyoo. Cov cheeb tsam uas muaj kev phom sij tshaj plaws yog thaj av 3,000-mais thaj av uas suav nrog kaum lub tebchaws hauv thaj tsam Sahel ntawm Africa. Lub Sahel yog thaj chaw nruab nrab ntawm Saharan Desert thiab Sudanian Savannah.

Qhov twg yog suab puam hauv South Africa?

South Africa tau poob txog 300 txog 400 lab tons ntawm av saum toj no txhua xyoo. Tej cheeb tsam xws li Northern Cape yog qhov tshwj xeeb tshaj yog muaj suab puam. Yuav tsum txwv tsis pub muaj tsiaj nyob hauv thaj av yuav tsum tau txo, cia cov nroj tsuag kom rov muaj dua.

thaj chaw twg tuaj yeem muaj suab puam tshwm sim hauv?

Drylands suav nrog thaj tsam 38% ntawm lub ntiaj teb thaj av, npog ntau ntawm North thiab yav qab teb Africa, sab hnub poob North America, Australia, Middle East thiab Central Asia. Drylands yog tsev rau kwv yees li 2.7 billion tus neeg (pdf) - 90% ntawm lawv nyob hauv cov tebchaws tsim.

Vim li cas Africa thiaj muaj suab puam?

kev txom nyem ntsig txog kev ua liaj ua teb yog tus pab cuam lojmus desertification. Kev cog qoob loo tsis tu ncua yam tsis ntxiv cov tshuaj ntxiv, overgrazing, tsis muaj av thiab cov qauv kev txuag dej, thiab cov hluav taws kub hnyiab ua rau cov txheej txheem desertification.

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