Natural resources are the raw materials and sources of energy used and consumed by society. Examples include sunlight, air, water, land, rocks, ecosystems and living things.

A material only becomes a resource once society can use it. That status depends partly on human needs, knowledge and technology, rather than simply on the material’s existence. Sunlight, water and rocks are abiotic examples. Forests, crops and fish are biotic.

These resources aren’t distributed evenly. Climate, geology and ecosystem productivity create unequal physical access between societies. Wealth, infrastructure and political power then influence who can actually use the resources available.

Natural capital is the stock of natural resources available on Earth. Think of capital as the underlying asset, not the amount taken from it in a single year.

A local river catchment might contain three contrasting forms:

• the river and groundwater stored in its aquifers;
• fertile soil that supports farms and woodland;
• the living stock of trees, fish, pollinators and other organisms.

These forms depend on one another. Vegetation protects the soil, which stores and filters water; that water then sustains organisms. Damage to one stock can therefore reduce several others.

Natural income is the flow of goods and services provided by natural capital. Natural capital is the stock; natural income is the return it produces over time.

A good is a tangible product obtained from natural capital, such as harvested shellfish, fruit, fibre or construction wood. By contrast, a service is a beneficial ecological process provided by natural capital, such as climate regulation, water purification or flood prevention.

Woodland provides a clear example. The standing trees, soils and organisms make up its natural capital. Harvested wood is a good. Rainfall interception, carbon storage and slope stabilization are services. Sustainable management protects the woodland stock, allowing these flows to continue.

Calling nature “capital” and its benefits “income” puts ecosystems into economic terms. This can reinforce an anthropocentric view: forests, wetlands and species may seem valuable mainly because of what they provide for people. Taken to an extreme, the same reasoning presents nature as something available for human exploitation.

The model has practical strengths too. It brings hidden ecological benefits into planning and shows how using up the stock reduces future income. It also gives governments a way to compare development with conservation. Instead of being dismissed as “unused land”, a wetland may be recognized as an asset that stores water and reduces flooding.

An ethical limitation remains. Cultural, spiritual and intrinsic value may resist pricing. One compromise is to treat natural-capital accounting as a decision-making tool, without assuming that money can replace every organism or sacred place. Transparent evidence and stakeholder participation can help reconcile competing perspectives. Limits can protect essential ecological processes while still allowing carefully managed use.

An ecosystem service is a life-supporting benefit that an ecosystem provides to living things, including humans. Ecological processes provide these services, often without being reflected in market prices.

Examples include:

• water replenishment, where infiltration and soil storage recharge groundwater and maintain river flow;
• flood protection, when wetlands and floodplains temporarily store water and slow runoff;
• erosion protection, because roots bind soil while vegetation reduces the force of rain, wind and waves;
• pollution mitigation, as soils and organisms trap, absorb or transform contaminants;
• carbon sequestration, which is the capture and storage of atmospheric $CO_2$ in biomass, soils, oceans or geological formations.

A reed-bed buffer zone is a vegetated strip dominated by reeds that intercepts runoff before it reaches open water. As water passes through, sediment settles, plants absorb inorganic nutrients, and microorganisms transform some pollutants. This can reduce the risk of eutrophication, but it cannot compensate for unlimited pollution.

All resources are finite because their availability is limited by quantity, location, quality or the rate at which natural processes replace them.

A renewable resource is a resource that can be regenerated and/or replaced as fast as it is being used. Crops and timber are replaced through growth or reproduction. Other resources depend on recurring processes, such as freshwater circulation and ozone formation.

A non-renewable resource is a resource that is not replaced on a timescale comparable with its rate of human use. Metal ores and fossil fuels form so slowly that extraction causes their accessible stocks to decline.

Renewability isn't a permanent label; it depends on how a resource is used. When a fish population reproduces more slowly than it is harvested, the stock shrinks and its use becomes unsustainable. In practical terms, it is being treated as non-renewable. Freshwater is renewed through the water cycle, yet an aquifer can still be depleted if abstraction exceeds recharge.

Renewability and sustainable use

Renewability places an ecological ceiling on resource use. Harvesting is sustainable only when it remains at or below the rate of regeneration, and pollution must not damage the processes that allow renewal. Access and benefits must still be considered over the long term, even when use stays within that ceiling. Human societies can use renewable natural capital sustainably to a substantial extent, but only if rates are measured, uncertainty is allowed for and management responds when stocks decline.

Natural capital can have several distinct forms of value, and these often overlap:

• Aesthetic value is value arising from beauty or sensory appreciation, for example, the enjoyment of a dramatic coastline.
• Cultural value is value arising from shared traditions, identity or heritage, as in a forest used for customary ceremonies.
• Economic value is value arising from market income or avoided financial costs, such as income from sustainably harvested resin or reduced flood-repair costs.
• Environmental value is value arising from maintaining ecological structure and processes, for example, when a marsh supports nutrient cycling.
• Health value is value arising from benefits to physical or mental well-being, such as the cleaner air provided by urban trees.
• Intrinsic value is value possessed by nature independently of its usefulness to humans, including the continued existence of an endemic frog.
• Social value is value arising from relationships, community use and social well-being, as shown by a shared riverside meeting place.
• Spiritual value is value arising from sacred meaning or a connection beyond material use, such as a mountain regarded as sacred.
• Technological value is value arising from a resource's use in tools, processes or innovation, for example, silica used in electronics.

A single place may hold all these values at the same time. Different people, though, may give each one a different weight.

Investigating values with a survey

For a school-community survey, describe several ecosystem services clearly and ask one focused question. Respondents might rate the importance of each service using the same five-point scale. Use identical wording when sampling students, teachers and support staff. Record relevant group information without identifying anyone, and keep the descriptions neutral rather than leading.

The survey should cover services from different categories, not just familiar products. For each service, calculate the distribution or median response, then compare groups with an appropriate bar chart. Leave space for open responses too, since fixed choices may miss cultural or spiritual values. Participation should be voluntary. The report also needs to recognise limitations, including a small sample, non-response and the gap between stated values and actual behaviour.

The value of natural capital is dynamic: it changes over time rather than staying fixed. Scarcity, population growth, new technology or fashion can raise its value. So can regulation or the recognition of an ecosystem service. In contrast, value may fall because of substitution, technological obsolescence, falling demand, environmental damage or changing social values.

Peruvian guano

In the nineteenth century, nitrogen-rich seabird guano from islands off Peru became a highly valuable agricultural fertilizer. Deposits were limited and international demand was strong, which increased its economic importance. Later, its value declined as alternative fertilizers became widely available and industrial nitrogen fixation expanded. The guano was still there; technology had changed its relative usefulness.

Natural rubber in Southeast Asia

Plantation rubber rose in value as bicycles and motor vehicles became more common because their tyres needed an elastic, durable material. During the twentieth century, synthetic substitutes reduced reliance on natural rubber. More recently, renewed interest has been supported by demand for tyres and specialized products, along with concern about petroleum-based materials. Its future value may shift again as disease risks, land-use impacts and transport technology change.

The key lesson is that value doesn’t sit permanently inside a resource. It develops through interactions between natural scarcity, human preferences, institutions and technology.

Sustainability is the use and management of environmental resources in a way that allows ecological systems and human well-being to persist over the long term. Two rate conditions are central:

• resources must not be removed more rapidly than they can regenerate;
• wastes must not enter the environment more rapidly than they can be transformed, dispersed or stored without unacceptable harm.

When harvesting becomes excessive, natural capital declines, reducing future natural income. This happened in the Aral Sea basin. Very large irrigation withdrawals for cotton reduced inflow and shrank the lake. Salinity increased, damaging fisheries and lakeside livelihoods. An ecological loss became a social and economic one too.

Waste pollution can exceed the environment’s natural processing capacity. In Lake Erie, excess phosphorus promoted algal growth. Decomposition then consumed dissolved oxygen and harmed aquatic organisms, while some blooms threatened drinking-water quality. Dilution isn’t an unlimited service.

Natural resources can therefore be used sustainably only where governance keeps pressures within ecological limits. Monitoring and enforceable rules can help, as can cleaner production and changes in consumption. Even so, perfect sustainability is difficult to guarantee because of uncertainty, unequal power and rising demand.

Resource security depends on the ability of societies to ensure the long-term availability of sufficient natural resources to meet demand. Security covers quantity, quality, affordability, reliable access and resilience to disruption. The physical presence of a resource isn’t enough.

Water security in Singapore

Singapore has little land available for catchments and, historically, relied heavily on imported water. It has greatly improved its water security by protecting reservoirs, capturing rainwater, producing high-grade reclaimed water, using desalination and managing demand. This range of sources lowers the risk that failure of any one source will cause a shortage. Even so, desalination uses large amounts of energy, imported supplies remain politically sensitive and climate change may affect rainfall. Water security is high, but it isn’t absolute.

Water security in Ethiopia

Ethiopia has major rivers and groundwater resources, but many communities still face seasonal scarcity or unsafe supplies. Reliable access is restricted by variable rainfall and drought, as well as dispersed rural settlements and limited capacity for treatment and maintenance. Boreholes and community water schemes have improved provision in some areas. However, failed pumps, financial constraints and rapid population growth continue to create insecurity.

This contrast shows why physical supply alone doesn’t determine security. Singapore has limited natural freshwater, but strong infrastructure and governance. Ethiopia has substantial water resources, yet access and reliability are less complete. Resource security has therefore been achieved to a much greater extent in Singapore.

A society’s decisions about a natural resource depend on several factors that often interact:

• economic: costs, jobs, export earnings and investments already made;
• sociocultural: traditions, ways of life, public acceptance and Indigenous rights;
• political: government priorities, lobbying, ownership and regulation;
• environmental: emissions, effects on biodiversity, pollution and the renewal of resources;
• geographical: climate, geology, relief and distance from users;
• technological: available expertise, infrastructure and efficiency;
• historical: previous investments and long-established patterns of use.

Geothermal energy in Iceland

Iceland’s volcanic geology makes geothermal heat accessible. Its cold winters create high demand for heating, and engineering expertise and district-heating networks make using the resource practical. Government investment supports this use, as does a social preference for domestic energy. There are still environmental concerns, such as landscape disturbance, gas releases and pressure on geothermal fields. Local decisions therefore require monitoring and limits.

International agreements aimed at reducing greenhouse-gas emissions and achieving net zero also shift priorities. They increase pressure to replace fossil fuels, improve efficiency and protect carbon stores. Such agreements can encourage investment and regulation, though workers, consumers and regions don’t share the costs and benefits evenly.

Reconciling perspectives

There is rarely one objectively “correct” outcome when choosing how to use a resource. Reconciliation depends on open access to evidence and representation for affected stakeholders. It also requires recognition of ecological limits and a transparent comparison of short- and long-term effects. Instead of allowing unrestricted exploitation or imposing complete exclusion, a compromise might combine restricted use with compensation, alternative employment and protected areas.

A management strategy is a coordinated plan used to guide resource use toward stated objectives. By contrast, an intervention is a deliberate action that changes incentives, permissions or behaviour.

Governments can turn the Sustainable Development Goals into national action plans that set targets, assign responsibilities, allocate budgets and monitor progress. Taxes can raise prices and discourage damaging resource use, while fines penalise breaches. Legislation may also limit extraction or emissions. Such measures work best when enforcement is credible and people have access to lower-impact alternatives.

Preferred choices can be encouraged through subsidies, procurement rules, publicity campaigns, research or education. For example, governments may fund concrete that absorbs and stores $CO_2$, require wind-turbine components designed for recycling, or support biological ammonia production as a lower-emission alternative to the Haber process.

Any strategy needs to be checked for side effects. Raising fuel prices may cut consumption, but it can place a disproportionate burden on low-income or rural households. Targeted rebates or investment in public transport can make the policy fairer without removing its environmental signal.

NGOs, local communities and social movements can shape resource use through public campaigns, social media, citizen monitoring and boycotts. They may also organise practical projects such as repair and recycling schemes. These groups can shift social norms and hold governments or firms accountable, although their influence depends on funding, participation and access to decision-makers.

The Sustainable Development Goals are a set of 17 goals adopted by the United Nations to achieve sustainable development. They give countries shared objectives for coordinating action, tracking progress and building partnerships. Each country can adapt implementation to its own circumstances. Detailed recall of every goal is not required.

Two goals are particularly useful for resource management:

• SDG 6: Clean Water and Sanitation supports efficient water use and better water quality, along with wastewater treatment and the protection of water-related ecosystems. For example, a partnership could bring together government regulation, international finance and community management to reduce leakage and extend safe supply.
• SDG 15: Life on Land supports sustainable forest management, the restoration of degraded land and reduced biodiversity loss. Governments and landowners can work with Indigenous communities and businesses on protected areas, restoration and traceable supply chains.

The framework also shows how the goals connect. Expanding water supply by destroying wetlands, for instance, would appear to advance one target while undermining another. A common global direction is a key strength. However, the goals aren’t automatically enforceable; they depend on national implementation, finance and honest monitoring.

An environmental impact assessment assesses the environmental, social and economic impacts and sustainability of a development project through independent, detailed surveys, followed by audits and continued monitoring after project completion. The usual abbreviation is EIA.

The assessment needs to happen early enough to affect whether the project goes ahead, where it is located and how it is designed. Likely impacts are compared with alternatives, while the EIA identifies mitigation and communicates its findings to decision-makers and the public.

An EIA is an ongoing process, not a one-off report. Initial surveys provide the evidence, and predicted impacts inform consent conditions. Audits then check whether the promised measures were put in place. After completion, monitoring shows whether the actual effects match the predictions. If unexpected harm appears, management should be adjusted.

Rules for EIAs vary between countries and regions. Differences include which projects need an EIA, who prepares it, the length of consultation periods, legal standards and enforcement. As a result, similar projects may face different requirements.

A baseline study is an investigation that measures environmental and social conditions before a project begins. It provides a starting point for comparing predicted changes with those later observed. This evidence helps assess possible impacts and shape mitigation that avoids, reduces, restores or compensates for harm.

For a proposed coastal resort, suitable parameters could include:

• habitat area, species abundance and breeding sites;
• water quality, sediment movement and erosion rates;
• freshwater availability and wastewater capacity;
• noise, air quality, traffic and greenhouse-gas emissions;
• employment, housing pressure and access to public spaces;
• archaeological sites, cultural practices and landscape character;
• exposure to storms, flooding and sea-level change.

The parameters chosen must suit both the project and its location. If only biodiversity were measured, social and economic impacts would be missed. Looking only at jobs would overlook ecological costs. An in-depth study of one particular EIA is not required here.

A stakeholder is a person or group that affects, is affected by, or has a legitimate interest in a decision. When an EIA is published, local citizens can examine the evidence, challenge assumptions and take part before consent is finalized.

Involving all relevant stakeholders can bring local knowledge to light and expose impacts that may otherwise be missed. It can also improve mitigation and make the process more legitimate. Residents, for example, may know about seasonal flood routes or culturally important sites that don’t appear on technical maps. Different evidence and values may come from developers, workers, regulators, scientists, local businesses and groups representing future generations.

Participation has limits. Consultation costs time and money, while differences in expertise or influence can leave some stakeholders with a stronger voice than others. Organized groups may dominate meetings, and competing interests may be impossible to satisfy at the same time. Meaningful scrutiny can also be restricted by commercial confidentiality and highly technical reports.

A strong approach doesn’t assume that each stakeholder has a veto, or that consultation will produce agreement. Instead, it provides accessible information and early opportunities to respond. Objections are handled transparently, and reasons are given for the final decision. Participation then has real influence without making decisions impossible.

A resource may be biologically renewable even when its supply chain is unsustainable. That chain covers extraction or land preparation, harvesting, transport and processing—not just the finished product.

Palm oil from Borneo

Oil-palm fruit is renewable because plantations can produce new crops repeatedly. Yet creating those plantations may require tropical forest or peatland to be cleared and drained. This releases stored carbon and destroys habitat. Harvesting can rely on poorly protected labour, while repeated monoculture may lower soil quality and increase chemical runoff.

Moving the fruit and oil requires roads, ships and fuel. New roads can split up habitats and expose previously remote forests to further exploitation. Processing mills consume energy and generate organic wastewater, which can deplete oxygen in rivers when left untreated. Impacts can be reduced through certification, protection of high-conservation-value forest, methane capture, wastewater treatment and traceable supply chains. Weak enforcement or indirect land-use change, however, can undermine these measures.

The crop may be renewable; the system that supplies it may still be unsustainable.

Producers and consumers often benefit from extraction straight away, while the costs of depletion emerge later or affect other people. Businesses may chase rapid returns. Governments may focus on employment and tax revenue, while consumers favour low prices. As a result, short-term production continues even as long-term natural income falls.

Atlantic bluefin tuna shows how this happens. High market prices drove intensive fishing, and restraint was difficult because fish stocks are mobile and international enforcement is imperfect. Advanced locating and harvesting technology increased catches. Excessive removal, however, reduced breeding populations and put the future fishery at risk. Fishers then felt pressure to catch the remaining individuals before their competitors could.

Recovery can be supported through catch limits and seasonal closures, alongside minimum sizes, protected spawning areas and traceable sales. These controls restrict income and consumption in the short term. Over the long term, they preserve the population and the livelihoods that depend on it. This is the central conflict between immediate economic response and sustained natural income.

Natural resource insecurity is a condition in which sufficient resources of acceptable quality cannot be relied upon over the long term. It may constrain production and raise prices. It can also damage health, deter investment and redirect public spending, slowing socio-economic development.

Environmental degradation may follow. When resources are scarce, people may cultivate fragile land, extract resources illegally, overpump groundwater or turn to dirtier fuels. Unequal access can deepen grievances within countries and across borders, especially when rivers, fisheries or mineral supply chains are shared.

Geopolitical power changes as different resources gain strategic importance. Oil production is heavily concentrated among members of the Organization of the Petroleum Exporting Countries (OPEC), an intergovernmental organization of major petroleum-exporting states that coordinates oil policies among its members. With batteries and electronics becoming more important, lithium, cobalt and rare-earth elements now receive greater attention. Much of the mining is concentrated in Australia, China, Chile and the Democratic Republic of the Congo. China, meanwhile, dominates the processing of many of these minerals, so control over processing may matter as much as ownership of the ore.

Nile water and the Grand Ethiopian Renaissance Dam

For Ethiopia, the dam provides opportunities for electricity, export income and development. Downstream, Egypt fears that filling the reservoir and operating it during drought years could reduce water availability. One country’s energy security is therefore tied to another’s water and food security through the shared river. Negotiations about filling schedules, data sharing and drought management illustrate how insecurity can create geopolitical tension, even when every party gains something from the resource.

Resource insecurity doesn’t automatically lead to conflict. Institutions, trade, agreements and trust can lower the risk. However, where governance is weak and access seems unfair, scarcity or dependence may intensify tensions that already exist.

Resource security can be improved in three broad ways: cut demand, increase supply or change the technology used. Conservation and greater efficiency lower demand. Supply may be expanded or diversified, while new technology can open up domestic resources or resources that were previously unusable. All three approaches bring costs and environmental limits.

Food: controlled-environment farming in Singapore

Hydroponic and vertical farms allow Singapore to supplement its imported food. By using controlled conditions, these farms produce more per unit of land and shorten supply chains. That makes the country more resilient when imports are disrupted. However, the approach needs capital and energy, and it cannot replace every imported crop economically. It increases food security but doesn’t guarantee it.

Water: leakage reduction in Phnom Penh, Cambodia

Metering, repairing pipes and improving utility management reduce the amount of water lost before it reaches consumers. More water is then available without additional extraction from rivers or aquifers. Reliable billing can pay for maintenance, though tariffs must stay affordable for low-income households.

Energy: wind power in Denmark

Generating wind power domestically helps Denmark rely less on imported fossil fuels and gives it a more diverse electricity supply. Interconnection, storage, demand management and backup generation can manage the variable output. This technological shift strengthens energy security and reduces emissions, but imported materials, grid investment and acceptable siting are still needed.

One measure alone won’t be enough. Durable resource security usually combines efficient demand, diverse supplies and appropriate technology with ecosystem protection and contingency planning.