Fragile Environments Are Under Threat From Desertification, Deforestation And Global Climate Change
Gbogbo ọrọ náà
Some environments absorb damage and bounce back. Others sit so close to the edge of what they can tolerate that one bad decade of rainfall, one new road or one herd too many tips them into a decline that lasts generations. Geographers call these fragile environments, and three processes are pushing them hardest: desertification, deforestation and global climate change.
This lesson maps where fragile environments are and what makes them fragile, then works through the causes of desertification and deforestation in turn. It closes on climate change, where you will need both sides of the story: the genuine natural drivers of past climate change, including Milankovitch cycles, solar variation and volcanism, and the human activities that are driving the enhanced greenhouse effect today.
Ebumnobi
- Distributions and characteristics of the world's fragile environments
- Causes of desertification (drought, population pressure, fuel supply, overgrazing, migration) and deforestation (commercial timber extraction, agriculture, mining, transport, settlement and HEP)
- Causes of natural climate change (Milankovitch cycles, solar variation and volcanism) and how human activities (industry, transport, energy, and farming) can cause the enhanced greenhouse effect
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Fragile Environments Are Under Threat From Desertification, Deforestation And Global Climate Change. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Which of the following best explains why tropical rainforest is described as a fragile environment? A) It receives very little rainfall B) Most nutrients are stored in the vegetation rather than the soil C) It has very low biodiversity D) The growing season lasts only a few weeks Answer: B
- Approximately how long is one full eccentricity cycle in the Milankovitch model? A) 100 years B) 4,100 years C) 41,000 years D) 100,000 years Answer: D
- What is the short-term climatic effect of a large explosive volcanic eruption? A) Warming, because carbon dioxide is released B) Cooling, because sulfate aerosols reflect incoming sunlight C) No effect, because ash falls out within days D) Warming, because ash darkens the ice sheets Answer: B
- Which gas is released mainly by cattle and by flooded rice paddies? A) Nitrous oxide B) Sulfur dioxide C) Methane D) Ozone Answer: C
- By roughly how much does total solar irradiance vary over the 11-year sunspot cycle? A) 0.1 per cent B) 1 per cent C) 5 per cent D) 15 per cent Answer: A
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Fragile Environments Are Under Threat From Desertification, Deforestation And Global Climate Change? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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