Whales are renewable. So are cod, and so are rainforests. All three have been driven to collapse. The label on a resource tells you what it could do; how we extract, transport, process and consume it decides what actually happens. This is the page where renewable and sustainable come apart.
📘 What you need to know
Even a renewable resource can be used unsustainably, depending on how it is extracted, harvested, transported and processed.
Extraction is unsustainable when it damages ecosystems, depletes resources faster than they regenerate, or harms communities and economies.
Named cases: timber harvesting, overfishing, mining and hydropower development.
Excessive consumption means using resources faster than they can regenerate.
Its impacts are resource depletion, environmental degradation, biodiversity loss and climate change.
Whaling is the classic case study, from industrial-scale hunting to the 1986 IWC moratorium.
Economic drivers include the pursuit of short-term gains and advertising that promotes consumption as a lifestyle.
Renewable is not the same as sustainable
The bottom-left box is the one that catches students out. Overfishing and deforestation are failures of management, not failures of renewability.
Impact happens along the whole chain
It is tempting to judge sustainability by the harvest alone. But three activities carry impact, and any of them can make an otherwise renewable resource unsustainable.
This is a useful evaluation move. If a question calls something sustainable, ask which of the three stages that claim actually covers.
Four examples of unsustainable extraction
Activity
Problems it causes
Example
Timber harvesting
Deforestation reduces biodiversity and disrupts carbon storage; clear-cutting damages soil, causing erosion and desertification; illegal logging undermines sustainable forestry
Large-scale Amazon deforestation for agriculture and timber; habitat loss for orangutans in Indonesia from logging and palm oil plantations
Overfishing
Stocks depleted faster than they recover; destructive methods such as trawling damage marine habitats; bycatch of non-target species disrupts food webs
North Atlantic cod overfishing led to fishery collapse in the 1990s; the Great Barrier Reef faces pressure from unsustainable fishing and coral damage
Mining
Habitat destruction and pollution from toxic waste; high energy use adding to greenhouse gas emissions; displacement of local communities
Environmental degradation and human rights concerns around cobalt mining for electronics in the Congo
Hydropower development
Dams disrupt river ecosystems and block fish migration; upstream flooding destroys habitat and displaces people
The Three Gorges Dam in China displaced over a million people and caused widespread habitat loss
Hydropower is the interesting one. It is renewable energy and it is often held up as a climate solution, yet a large dam can be ecologically and socially devastating. Using it as an example shows you can hold two ideas at once.
Excessive consumption
Excessive consumption means using resources faster than they can regenerate, which leads directly to environmental degradation and resource depletion. The underlying driver is economic: industries and economies chase short-term gains, focusing on high production and consumption without weighing long-term sustainability.
Impact
What it looks like
Resource depletion
Finite resources such as fossil fuels, minerals and freshwater consumed unsustainably
Environmental degradation
Excessive production creates waste that pollutes air, water and soil
Loss of biodiversity
Overconsumption of resources such as fish and timber destroys habitats
Climate change
High levels of consumption and production drive greenhouse gas emissions
What drives it
Short-term economic gain. Industries prioritise immediate profit over sustainability. Fast fashion is the clearest case: cheap, disposable clothing generating waste and overusing resources.
Advertising and consumer culture. Media and marketing promote consumption as a lifestyle. Campaigns for new smartphones and seasonal trends push resource-intensive production cycles.
Case study: whaling
Whaling shows the full arc of excessive consumption, from boom to collapse to partial recovery.
Stage
What happened
Historical context
Industrial-scale whaling began in the 19th century, driven by demand for whale oil used in lighting, lubrication and soap. Blue whales, humpbacks and sperm whales were hunted towards extinction. By the mid-20th century, better ships and harpoons allowed unsustainable levels of hunting
Environmental impacts
Populations collapsed. Whales matter ecologically: their faeces fertilise ocean waters, promoting phytoplankton growth that absorbs carbon dioxide. Their decline disrupted food chains and affected other marine species
Socioeconomic impacts
Whaling economies collapsed too. Communities reliant on whaling, in countries such as Japan and Norway, faced economic difficulty once populations were too depleted to hunt
Global response
The 1986 moratorium by the International Whaling Commission banned commercial whaling, though loopholes for scientific research and cultural hunting are still used
Current challenges
Some countries continue whaling under controversial exemptions. Climate change, ocean pollution, ship collisions and entanglement in fishing gear now threaten recovery
Sustainable solutions
Whale-watching ecotourism in places such as Australia and Canada offers an economic alternative; the IWC and NGOs such as Greenpeace monitor and campaign; marine conservation zones allow populations to recover
The economic reversal is the lesson. Whales were worth more dead than alive until they nearly ran out. Whale-watching turned the same animals into a renewable income stream that only works if the population survives — the same logic as Brazil nut harvesting protecting rainforest.
WORKED EXAMPLE
Using an example, explain how a renewable resource can be used unsustainably. [4]
State the principle, then apply it to one named caseA resource is used unsustainably when the rate of extraction exceeds the rate at which the population or stock can regenerate.North Atlantic cod are renewable, but fishing removed them far faster than they could reproduce.Destructive methods such as trawling damaged the habitat itself, and bycatch disrupted the wider food web, slowing recovery further.The fishery collapsed in the 1990s despite cod being a renewable resourceAdding that the extraction method, not just the quantity, was part of the problem lifts the answer.
WORKED EXAMPLE
Discuss the environmental and socioeconomic consequences of excessive consumption, using whaling as an example. [6]
EnvironmentalOverhunting caused dramatic population collapse in blue, humpback and sperm whales. Because whale faeces fertilise surface waters and promote phytoplankton growth that absorbs carbon dioxide, the decline also disrupted nutrient cycling and food chains.SocioeconomicWhaling communities in countries such as Japan and Norway faced economic hardship once populations were too depleted to sustain hunting — the industry destroyed its own resource base.Response and judgementThe 1986 IWC moratorium banned commercial whaling, and ecotourism now offers an alternative income, though loopholes and new pressures such as pollution persist.Excessive consumption damaged both the ecosystem and the economy that depended on itThe phrase “destroyed its own resource base” is the key insight; it works for fisheries and forests too.
💡 Exam tip
State clearly that renewable does not mean sustainable. It is explicitly flagged in the syllabus.
Judge the full chain: extraction, transport and processing.
Have one example from each category ready: timber, fish, mineral, and energy infrastructure.
For whaling, know the 1986 IWC moratorium and the ecological role of whales in nutrient cycling.
Name the economic drivers — short-term profit and advertising — rather than blaming consumers vaguely.
Use ecotourism as the constructive ending. It shows conservation and economics can align.
⚠️ Common mix-up
Assuming renewable energy is automatically low impact. Large dams displace people and block rivers.
Blaming only the quantity harvested. Method matters too — trawling and clear-cutting damage the system itself.
Forgetting the socioeconomic side of collapse. Industries destroy their own livelihoods.
Saying whaling is fully banned. The moratorium has exemptions still in use.
Treating excessive consumption as individual greed. Advertising and profit structures drive it.
Ignoring transport and processing when judging whether a supply chain is sustainable.
Up next: Securing Natural Resources — resource insecurity, geopolitics, and the three routes to a more secure supply.
Want this explained one-to-one?
Book a free session with an experienced IB ESS tutor and get your trickiest topics made simple.
