The big idea: Extreme environments — hot arid deserts and cold polar/high-mountain regions — still hold valuable resources: land for agriculture, water in aquifers and ice, and minerals (oil, gas, metals).
Using them means weighing opportunities against challenges. The opportunities are the resources themselves and the technology + capital that unlock them; the challenges are the harsh climate, remoteness, poor accessibility and high costs.
The scope to use a resource varies from place to place — wealthier, better-connected, water-richer locations can exploit far more than remote, dry, capital-poor ones.
Key terms for resource use
- Resource — anything useful people extract or use (farmland, water, oil, gas, metals).
- Aridity — extreme dryness; low, unreliable rainfall and high evaporation.
- Irrigation — supplying water artificially to grow crops where rainfall is too low.
- Aquifer — an underground store of water in permeable rock, reached by wells/boreholes.
- Salinization — salt building up in irrigated soil as water evaporates, harming crops.
- Remoteness / accessibility — how far and how hard a place is to reach; it sets transport cost.
- Mineral extraction — mining or drilling for oil, gas and metals (e.g. Arctic oil).
Opportunities vs challenges: Every resource use in an extreme environment is a balance.
Opportunity = the resource + the technology, capital or market that lets you use it.
Challenge = the climate, distance, cost or environmental damage that holds it back. Top essays weigh the two.
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How this is tested: A shaded resource map of an extreme environment — here a desert region coloured by water stress — is the usual starting figure. Read the key, then Identify the driest area, Estimate a value, or Describe the pattern ([1–2 marks]) before the short Outline [2] and Explain [6] questions on why aridity makes farming hard.
Quote a region name and a figure straight off the key — that is where the easy data marks are.
Read the key first. Which areas are darkest (most water-stressed) and so hardest to farm?
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Identify the most water-stressed area on the map and estimate its value.
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| Resource | Opportunity | Challenge |
|---|---|---|
| Farmland | Warm year-round; long growing season if watered | Low, unreliable rainfall; desertification; wind erosion |
| Water | Deep aquifers; rivers crossing the desert (exogenous) | High evaporation; falling water tables; salinization |
| Irrigation tech | Dams, drip irrigation, solar wells, desalination | Costly; over-extraction; competition between users |
| Minerals | Oil, gas, phosphates, copper near the surface | Remote; expensive transport; water needed to process |
Why low rainfall makes desert farming hard
- Crops need irrigation — rain is too low/unreliable, so farmers must pump water at high cost.
- Salinization — irrigation water evaporates and leaves salt in the soil, cutting yields.
- Desertification & wind erosion — bare, dry soil blows away and land degrades.
- Falling water tables — over-pumping aquifers lowers them, so wells must go deeper.
Real example — irrigated farming in inland Australia: In Australia's dry interior, the Murray-Darling Basin is farmed with large-scale irrigation drawn from rivers and aquifers.
Opportunity: warm sun + stored water grow cotton, fruit and cereals where rain alone could not.
Challenge: over-extraction has lowered river flows, and salinization has degraded soil — so the scope to farm varies sharply between water-rich and water-poor parts of the basin.
Explain two ways in which low rainfall makes farming difficult in a hot, arid environment.
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Cold extreme environments — the Arctic, Antarctica, Alaska and high mountains like the Alps — are rich in minerals (oil, gas, metals) but very hard to use. The barriers are remoteness, poor accessibility, a harsh climate and the cost of working there. Technology (drilling, desalination, water transfer, ice roads) is what turns a resource into a usable one.
| Factor | Opportunity it creates | Challenge it creates |
|---|---|---|
| Minerals (oil/gas/metals) | Valuable reserves (e.g. Arctic oil, Alaskan gas) | Need huge capital + technology to reach |
| Remoteness | Untouched, large reserves still available | High transport cost, distance from roads/ports, high wages |
| Accessibility | Ice roads / pipelines can be built | Steep relief, deep snow, ice limit access and lengthen travel |
| Cold climate | Permafrost gives firm ground to build on | Freezing slows work; thaw damages roads and pipelines |
Technology that unlocks water and minerals
- Drilling & boreholes — reach deep aquifers (arid) or oil and gas (cold/arid).
- Desalination — remove salt from seawater for usable freshwater in dry coasts.
- Water transfer schemes — pipe or canal water from a wetter region to a dry one.
- Solar-powered wells / pumps — lift groundwater where there is no grid power.
- Pipelines & ice roads — move oil, gas and supplies across remote frozen ground.
Real example — Arctic oil and gas (Russia, Alaska): Major oil and gas fields sit in the Russian Arctic and on Alaska's North Slope, with the Trans-Alaska Pipeline carrying oil ~1,300 km to an ice-free port.
Opportunity: enormous reserves and high prices justify the cost.
Challenge: extreme remoteness means very high transport costs and wages; thawing permafrost can buckle pipelines; and spills threaten a fragile ecosystem. So extraction only pays where reserves are large and prices are high.
Outline one way that remoteness makes developing resources in a cold environment difficult, and explain why.
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How this is tested — the [10] Examine essay: Paper 1, Option C ends with a 10-mark Examine essay, marked on markbands. Recurring versions ask you to weigh the opportunities and challenges of using a resource in an extreme environment — irrigation/agriculture in hot arid areas, or mineral extraction in one extreme environment.
Top band (9-10) needs: a named case study with data, both opportunities and challenges developed, an explanation of why the scope varies between places, and a justified evaluative conclusion.
Examine the opportunities and the challenges of mineral extraction in one extreme environment you have studied.
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See the mark-by-mark plan — for / against / judgement, with marking guidance — in study mode.