Risk, exposure and vulnerability

Climate change risk is the possibility that a climate-related hazard will harm exposed and vulnerable people or places. Exposure refers to the presence of people, property or environmental systems in an area where a climate hazard may occur. Vulnerability describes how susceptible they are to harm and how limited their ability is to cope or adapt.

Exposure and vulnerability aren’t the same. Two coastal communities may experience similar sea-level rise yet suffer very different losses due to income, housing quality, protection, public services and preparedness.

Why vulnerability varies

Location determines exposure. Low-lying coasts and deltas face inundation and storm surges, while dryland regions may experience intensified drought. Settlements near unstable slopes or floodplains can also face secondary hazards.

Wealth shapes people’s capacity to prepare, respond and recover. Wealthier households and governments can usually pay for protective infrastructure, insurance, forecasting, emergency services and reconstruction. By contrast, poverty may force people to settle on hazardous land or rely on climate-sensitive livelihoods.

Social differences mean that vulnerability varies even within one place:

• Age: children and older people may be less mobile and more sensitive to heat, disease and food shortages.
• Gender: unequal access to income, land, education or decision-making can limit adaptive capacity. The effects depend on the social setting, rather than gender alone.
• Education: access to information can help people understand warnings, available assistance and adaptation choices.
• Risk perception: people are more likely to prepare when they see a threat as immediate. Others may underestimate unfamiliar hazards, distrust authorities or accept the risk because they cannot afford to relocate.

Contrasting societies

A detailed comparison should consider the hazards each society faces, who and what are exposed, which social groups are most vulnerable, adaptive capacity and actual responses. Differences within each society also need to be recognized.

The Netherlands and Bangladesh offer one possible contrast, although the class may use other societies. Both have densely populated, low-lying coastal and delta environments exposed to flooding, sea-level rise and storm surges.

In the Netherlands, high national income, engineered coastal defences, spatial planning, forecasting and effective emergency institutions reduce vulnerability despite substantial exposure. The risk hasn’t disappeared. Expensive infrastructure can fail, while continued protection depends on long-term public funding.

Bangladesh faces greater vulnerability because many households have low incomes, occupy exposed delta land and depend on climate-sensitive farming or fishing. Limited resources can slow recovery and make permanent relocation difficult. Even so, cyclone shelters, warning systems and community preparedness have increased resilience. Lower-income societies are neither passive nor uniformly vulnerable.

This comparison shows that a hazard doesn’t automatically become a disaster. Its effects depend on exposure, social inequality, risk perception and the capacity to adapt.

Key terms: climate change risk, exposure, vulnerability, location, wealth, social differences, risk perception, adaptive capacity, resilience.

Adaptation and mitigation

Adaptation involves adjusting human or natural systems to reduce harm from climate change or benefit from possible opportunities. Mitigation involves cutting greenhouse gas emissions or removing more greenhouse gases from the atmosphere.

Adaptation focuses mainly on the consequences of climate change; mitigation tackles its causes. Governments commonly need both. Adaptation can reduce losses now and in the near future, while mitigation limits the scale of longer-term change.

Global geopolitical efforts

Greenhouse gases mix throughout the atmosphere. As a result, emissions from one country can cause impacts elsewhere. Major emitters may be far from low-emitting countries that face severe drought, sea-level rise or extreme weather.

This spatial separation creates geopolitical disagreements about responsibility. Governments may debate:

• whether responsibility should be based on present emissions, historical emissions or emissions per person;
• whether wealthier countries should provide finance and technology to more vulnerable countries;
• how quickly different economies should reduce emissions;
• how to balance national development and sovereignty against collective action.

Through international agreements, governments can set shared goals, report emissions and coordinate finance and mitigation. These agreements work best when participation is widespread, national action is credible, monitoring is effective and ambition is sufficient. Progress may still be limited because governments face different costs, energy needs and political pressures.

Carbon offsetting and trading

Carbon offsetting compensates for emissions produced in one place by funding an emissions reduction or carbon removal elsewhere. Examples include supporting renewable energy, protecting forests or restoring ecosystems.

Offsets can channel money into lower-cost projects and connect emitters with mitigation efforts in other places. Their value falls if the reduction would have happened anyway, stored carbon is later released, emissions move elsewhere or the same reduction is counted more than once. Offsetting shouldn’t replace cuts to avoidable emissions at source.

Carbon emissions trading establishes tradable rights or allowances to emit greenhouse gases. A government, or a group of governments, sets an overall emissions limit. Organizations that emit less than their allowance can then sell the surplus to those with higher reduction costs.

Trading provides a financial incentive to make reductions where they cost the least. Success depends on a restrictive cap, reliable measurement and enforcement. If too many allowances are available, the price remains weak and there is little pressure to change.

Technology and geo-engineering

Governments can fund, regulate or install technologies such as renewable energy, energy-efficient transport and buildings, carbon capture and climate-resilient infrastructure. Technology may support mitigation or adaptation, although its cost and availability differ between countries.

Geo-engineering is the deliberate, large-scale manipulation of Earth systems intended to counter climate change. Carbon-removal approaches aim to reduce atmospheric carbon dioxide, whereas solar-radiation approaches aim to reflect more incoming energy.

Geo-engineering may seem attractive if emissions reductions remain slow. However, it brings uncertainty, uneven regional effects and difficult questions over control. One state could alter climates beyond its borders, and suddenly stopping some interventions could cause rapid warming. International governance is therefore required rather than purely national decision-making.

Key terms: adaptation, mitigation, geopolitical efforts, spatial separation, carbon offsetting, carbon emissions trading, emissions cap, technology, geo-engineering.

Non-governmental stakeholders

Civil society includes voluntary organizations and collective groups that operate outside government and commercial business. These include non-governmental organizations, community groups, charities and campaigning movements. Corporate stakeholders are businesses whose investment, production, supply chains and products may contribute to climate change or help reduce it.

Non-governmental stakeholders work at many scales, from individual neighbourhoods to global supply chains. They may support government policy, challenge it or move faster than it.

Civil society strategies

Civil society organizations may:

• campaign for stronger public policy and shape public opinion;
• provide climate education and communicate risk;
• hold governments and businesses accountable through research, monitoring or legal action;
• organize local adaptation, such as preparedness, water conservation or ecosystem restoration;
• develop community-owned renewable energy and other low-carbon projects;
• represent vulnerable groups with limited influence over formal decision-making.

Local knowledge and public trust are key strengths, as is the ability to focus attention on climate justice. However, limited funding, reliance on volunteers or a lack of formal decision-making power may restrict their influence.

Corporate strategies

Businesses may reduce operational emissions by improving energy efficiency, using renewable electricity and changing transport. They can redesign products, cut supply-chain emissions, support adaptation, finance low-carbon technology and publish emissions targets.

Large corporations may act quickly and influence suppliers across several countries. Yet the quality of voluntary targets varies. Progress should be measured through actual emissions reductions, including supply-chain impacts, rather than publicity or distant promises. Misleading environmental claims are often described as greenwashing.

Country case study: non-governmental action

A country case study must identify the stakeholders and explain what each has done. It should distinguish adaptation from mitigation, then assess the reach and limitations of their actions. The class may choose any suitable country.

The United Kingdom offers one example. Environmental organizations such as Friends of the Earth have used campaigning alongside legal challenges intended to strengthen government climate planning. Community energy groups have promoted locally owned renewable generation and offered household energy advice. Corporations have introduced measures such as purchasing renewable electricity, using lower-emission vehicle fleets and setting supply-chain targets.

These actions affect one another. Civil society can put public and legal pressure on companies, while corporate purchasing may expand markets for low-carbon technology. Even so, voluntary action remains uneven. Non-governmental stakeholders alone cannot provide the national regulation, infrastructure and redistribution required for a complete response.

Key terms: civil society, corporate stakeholders, non-governmental organizations, community action, supply-chain emissions, accountability, greenwashing, adaptation, mitigation.

Need, practicality and urgency

A perspective is a way of seeing an issue, shaped by a stakeholder’s position, interests, knowledge and values. Stakeholders may agree that climate change exists yet still disagree about the response: what should be done, who should pay and how quickly action should happen.

These views differ across three linked questions:

Stakeholder interests and power

Governments have to balance climate commitments with energy security, employment, public spending and electoral pressure. Lower-income governments may argue that poverty reduction and basic infrastructure are still more immediate priorities, particularly where historical emissions were low.

Some businesses support policies that provide stable markets for low-carbon investment. Firms holding carbon-intensive assets, however, may resist rapid regulation. Workers and communities that rely on those industries may fear unemployment unless the transition provides retraining and alternative investment.

Civil society groups often stress precaution, climate justice and the interests of vulnerable groups or future generations. Individuals might support action in principle while opposing specific costs or projects that affect them directly.

Power isn’t evenly distributed. High-emitting states, major corporations and wealthy consumers often exert more influence over decisions than low-income communities facing severe impacts. The places most affected may also be spatially distant from the sources of emissions.

Reaching a judgement

Science alone doesn’t explain differences in perspective. Unequal costs and benefits also matter, as do contrasting timescales, trust in institutions, risk perception and beliefs about fairness.

The strongest responses pair immediate adaptation for people already exposed with sustained mitigation that reduces future risk. Whether these responses are practical depends on finance, technology and public support. Their fairness depends on how costs and responsibilities are distributed. Delay can lower short-term costs for some stakeholders, but it may raise long-term risk and adaptation costs for others.

Key terms: perspective, viewpoint, need, practicality, urgency, risk perception, climate justice, responsibility, power, uncertainty, adaptation, mitigation.