Climate change and the future of extreme environments

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**Ground that stays frozen year-round**; when it thaws it becomes unstable and damages infrastructure.

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Ice **melting back**, so it survives only at higher altitude and the meltwater rivers people rely on shrink.

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Productive **dryland turning to desert** as drought and erosion spread (e.g. the Sahel).

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**Adaptation** copes with the effects of climate change; **mitigation** cuts the causes (emissions).

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**Social, economic and environmental** — a truly sustainable strategy scores on all three.

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It **cracks roads, pipelines and houses**, opens new oil/gas routes, and thinner sea ice shortens hunting (Alaska).

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Shrinking meltwater cuts the **dry-season water supply** for irrigation and towns (Quechua farmers, Peru).

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Abundant sunshine powers **remote villages and desalination** for fresh water, without fossil fuels (Atacama / the Gulf).

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The **Great Green Wall** — drought-tolerant trees and crops plus soil/water conservation hold back the desert.

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It is **expensive**, depends on outside funding/experts, and can cause new harm (desalination brine, mining).

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Both sides (opportunities AND challenges), **named places**, a weighing of the three pillars, and a justified conclusion.

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The most sustainable schemes combine new tech with local traditional methods (Andean canals, Sahel agroforestry).