Governance of climate change

Mitigation means reducing or preventing greenhouse-gas emissions (or removing greenhouse gases from the atmosphere) so as to limit the amount of future warming — it tackles the CAUSE of climate change. Examples include switching to renewable energy, improving energy efficiency and pricing carbon through a carbon tax.

Adaptation, by contrast, means adjusting our lives, economies and infrastructure to cope with the impacts of climate change that can no longer be avoided — it tackles the EFFECTS. Examples include building sea walls, planting drought-resistant crops and setting up early-warning systems.

The key distinction is therefore that mitigation addresses the cause (emissions) while adaptation addresses the effects (impacts) — and an effective response needs both.

One feature is its temperature goal: the Paris Agreement aims to keep global warming well below 2 °C above pre-industrial levels and to pursue efforts to limit the increase to 1.5 °C. This gives all countries a clear, shared target to work towards.

A second feature is the use of Nationally Determined Contributions (NDCs). Rather than imposing targets from above, the agreement asks each country to set its own voluntary pledge to cut emissions, to report on its progress, and to strengthen its pledge over time (the 'ratchet' mechanism), with a global review every five years.

Together these features made the agreement near-universal — nearly 200 countries signed — although the NDCs are voluntary and not legally enforceable.

Both carbon taxes and carbon trading are economic tools that put a price on emitting carbon, making polluting more expensive so that firms have a financial incentive to cut their emissions.

A carbon tax sets a fixed PRICE per tonne of CO₂. Every tonne emitted incurs the charge, so firms reduce emissions where it is cheaper to cut than to pay the tax. The advantage is simplicity and a clear price signal; the disadvantage is that it can be politically unpopular and the government does not directly control the total quantity of emissions.

Carbon trading (cap-and-trade) instead fixes the QUANTITY of emissions. The government sets an overall cap and issues a fixed number of tradable permits. Firms that cut emissions can sell spare permits, while firms that exceed their allowance must buy more, so the market channels cuts to where they are cheapest. Tightening the cap over time forces emissions down. The EU Emissions Trading System (EU ETS) is the largest example.

The key difference is therefore what each one fixes: a carbon tax fixes the price and lets the quantity of emissions vary, whereas cap-and-trade fixes the quantity (the cap) and lets the price vary. Both only work if the price or cap is set firmly enough to change behaviour.

The Kyoto Protocol of 1997 was the first treaty to set legally binding emission-reduction targets, but only for developed ('Annex I') countries, following the principle of 'common but differentiated responsibilities'. Its strengths were that the targets were binding and it pioneered carbon trading; its weaknesses were that it covered only a shrinking share of global emissions, the United States never ratified it, and major emerging emitters such as China and India had no targets.

The Paris Agreement of 2015 took a different approach. It is near-universal — nearly 200 countries — and aims to keep warming well below 2 °C while pursuing 1.5 °C. Crucially, instead of binding top-down targets it relies on voluntary Nationally Determined Contributions (NDCs) set by each country, reported transparently and strengthened over time, plus climate finance for poorer nations.

The central contrast is therefore that Kyoto was BINDING but NARROW (developed nations only), whereas Paris is UNIVERSAL but VOLUNTARY (NDCs are not legally enforceable). Paris traded the bite of binding targets for the breadth of near-universal participation — which is why, although it covers far more of global emissions, current pledges still leave an emissions gap above 1.5 °C.

Responses to climate change fall into two pillars: mitigation, which reduces or prevents greenhouse-gas emissions and so tackles the cause, and adaptation, which adjusts our lives and infrastructure to cope with impacts and so tackles the effects. This essay assesses the claim that mitigation is the more important of the two. It argues that mitigation is more important in the long run because only mitigation can limit the ultimate scale of the problem, but that adaptation is indispensable and, for the most vulnerable, more urgent — so the two are better seen as complementary than as rivals.

The strongest case for prioritising mitigation is that it addresses the root cause. Strategies such as renewable energy, energy efficiency, carbon capture and storage, afforestation and carbon pricing (taxes and cap-and-trade schemes like the EU ETS) reduce the emissions that drive warming. Only mitigation can prevent impacts from growing ever larger: adaptation merely manages the symptoms, and if emissions keep rising the impacts eventually become too large and costly to adapt to. Some impacts, moreover, cannot be adapted to at all — a low-lying state such as Tuvalu cannot adapt its way out of disappearing beneath the sea. In this sense mitigation is the only response that can set an upper limit on the danger, which makes it foundational.

However, mitigation alone is insufficient, which is the core of the case for adaptation. Because of past emissions, a substantial amount of warming is already 'locked in' and will occur even if emissions stopped today. Adaptation — sea walls and managed retreat, drought-resistant crops, water management, early-warning systems and insurance — is therefore unavoidable. For the world's most vulnerable people, adaptation is also the more URGENT priority: a farmer in the Sahel facing drought now, or a community in Bangladesh facing cyclone surge now, cannot wait for global mitigation to take effect, and early-warning systems have already saved many thousands of lives. Adaptation delivers local, immediate, certain benefits, whereas mitigation delivers global, delayed and shared benefits.

The decisive evaluation is to recognise that the two operate on different scales and timeframes, and that prioritising one over the other is a false choice. Mitigation is a long-term, global necessity that only works if undertaken collectively — which is why it suffers from the free-rider problem and weak enforcement and so progresses slowly. Adaptation is a shorter-term, local necessity that individual countries can pursue without waiting for others. A response that mitigates but does not adapt leaves people exposed to warming already committed; a response that adapts but does not mitigate allows the problem to grow without limit until adaptation fails. The most defensible position is therefore that both are essential, and which is 'more important' depends on scale and timeframe: mitigation matters most for the long-term global outcome, adaptation most for protecting the vulnerable now.

There is also an equity dimension that complicates a simple ranking. The big emitters who most need to mitigate are largely the rich nations, while those who most need to adapt are largely the poor nations that emitted least — so the burden of each pillar falls on different groups. This is why climate finance, transferring resources from rich to poor nations, is needed to support adaptation alongside global mitigation.

In conclusion, I agree only partially with the statement. Mitigation is the more important response for the ultimate scale of climate change, because only it can tackle the cause and prevent impacts growing beyond what can be managed. But adaptation is not optional or secondary — it is unavoidable given locked-in warming and more urgent for the vulnerable. The most accurate judgement is therefore that mitigation and adaptation are complementary necessities, and an effective response must pursue both: mitigate to limit the long-term danger, and adapt to survive the change already under way.

International agreements are the centrepiece of global climate governance, from the 1992 UNFCCC and the 1997 Kyoto Protocol to the 2015 Paris Agreement. This essay assesses whether they have been an effective response to climate change. It argues that, judged against the goal of cutting emissions enough to limit warming, the agreements have built an indispensable framework and shifted expectations but have not yet delivered the necessary cuts — so they have been only partly effective: real but insufficient.

There is a genuine case that the agreements have been effective. The Paris Agreement is near-universal, with nearly 200 countries signed up to the shared goal of keeping warming well below 2 °C and pursuing 1.5 °C — a coordination achievement that Kyoto, covering only developed nations, never reached. Kyoto itself pioneered international carbon trading, a mechanism now embodied in schemes such as the EU Emissions Trading System. The IPCC, working under the UNFCCC, has built an authoritative shared evidence base that underpins negotiation. Partly because of the expectations these agreements set, many countries have adopted net-zero targets, and the costs of renewable energy have fallen dramatically. The Montreal Protocol on ozone-depleting substances, moreover, shows that binding global agreements CAN solve atmospheric problems decisively. Agreements have therefore been effective at coordinating action and shifting norms.

However, judged by results, the agreements have fallen short. Global greenhouse-gas emissions are still rising, not falling. The Paris Agreement's central weakness is that its Nationally Determined Contributions are voluntary and not legally enforceable, and even if every current NDC were met they would not add up to 1.5 °C — leaving a persistent 'emissions gap'. Promised climate finance, such as the $100 billion a year for developing countries, has been repeatedly under-delivered. Kyoto, for its part, excluded major emitters: the United States never ratified it, and China and India had no targets. So the agreements have not yet bent the emissions curve downward.

The decisive evaluation is to explain WHY the agreements under-deliver, which reveals both their value and their limits. The fundamental obstacle is the free-rider problem: cutting emissions is costly for each country, but the benefit of a stable climate is shared by all, so each is tempted to let others pay. Compounding this are the equity dispute over 'common but differentiated responsibilities' — who caused the problem and who should pay — and the absence of any world government to enforce compliance, leaving agreements reliant on voluntary pledges and peer pressure. These are not failures of the agreements so much as features of the problem itself, which is a 'tragedy of the commons'. Seen this way, the agreements are doing the essential work of coordination, but cannot by themselves overcome incentives that pull countries towards inaction.

The judgement must also weigh the alternative. Without international agreements there would be no shared goal, no transparency framework, no mechanism to channel finance and no peer pressure at all — so emissions would very probably be higher still. Effectiveness is therefore best judged relative to that counterfactual, not against perfection.

In conclusion, I agree only to a limited extent. International agreements have been effective at the indispensable tasks of coordinating nearly all nations around a shared goal, building a common evidence base and shifting global expectations, and they have very likely slowed the growth of emissions compared with having no agreements at all. But they have not yet been effective at the ultimate test — cutting emissions enough to keep warming within safe limits — because voluntary pledges, weak enforcement and the free-rider problem leave a persistent emissions gap. The most defensible verdict is that international agreements are a necessary but not yet sufficient response: real progress, but not enough, with future effectiveness depending on whether NDCs are strengthened and finance delivered.