Challenges to Net-Zero Implementation Decisions – Detailed Explanation With Case Laws

1. Introduction

Net-zero implementation decisions are government, regulatory and institutional decisions taken to convert climate targets into practical action. They may involve renewable-energy deployment, coal-plant retirement, carbon budgets, emissions standards, electricity-market reform, carbon pricing, energy-efficiency measures, transmission investment, carbon capture and storage, or restrictions on fossil-fuel projects.

Such decisions can be challenged when affected parties argue that the government or regulator has acted outside its legal powers, failed to consider relevant climate or socio-economic information, followed an unfair procedure, or adopted measures inconsistent with statutory climate obligations.

South Africa now has an important statutory framework through the Climate Change Act 22 of 2024, which commenced on 17 March 2025. The Act aims to support an effective climate response and a long-term just transition to a low-carbon and climate-resilient economy and society. (Government of South Africa)

2. Lack of Legal Authority

The first possible challenge concerns whether the decision-maker actually possesses the legal power to implement the proposed net-zero measure.

For example, a regulator cannot simply impose a new emissions obligation if its enabling legislation does not authorise such action.

The principle in Affordable Medicines Trust v Minister of Health is important by analogy. Public authorities must exercise regulatory powers within the authority granted to them by law.

Therefore, net-zero implementation requires a clear connection between:

climate legislation → regulatory power → implementation decision.

3. Failure to Follow Climate Legislation

A government may adopt a legally binding climate framework but fail to properly implement its requirements.

The Climate Change Act 22 of 2024 creates a framework intended to facilitate South Africa's climate response and just transition. (Government of South Africa)

Future challenges may therefore concern whether decisions concerning electricity generation, emissions reduction, adaptation or carbon-intensive activities properly take account of applicable climate obligations.

The legal issue is not simply whether a decision is consistent with a general idea of net zero, but whether the decision complies with the specific statutory duties and procedures applicable to the decision-maker.

4. Failure to Consider Climate Impacts

A particularly important ground is failure to consider relevant climate information.

The South African case of Earthlife Africa Johannesburg v Minister of Environmental Affairs is highly relevant. The case concerned environmental authorisation for the proposed Thabametsi coal-fired power station and recognised that climate-change impacts were relevant to environmental decision-making.

The principle is important for net-zero implementation because authorities cannot necessarily treat climate effects as irrelevant when making major energy decisions.

This becomes especially significant where a project could lock in substantial greenhouse-gas emissions for several decades.

5. Failure to Consider Alternatives

A net-zero decision may also be challenged if authorities fail to consider reasonable alternatives.

For example, when approving major electricity infrastructure, authorities may need to consider whether electricity demand can instead be met through:

renewable generation;

battery storage;

energy efficiency;

demand response;

transmission expansion; or

other lower-emission technologies.

The UK Supreme Court's decision in R (Finch) v Surrey County Council [2024] UKSC 20 is an important comparative authority. The Court held, by a 3–2 majority, that greenhouse-gas emissions from the eventual combustion of oil produced by the proposed project fell within the environmental-impact assessment required by law. (Supreme Court)

The case demonstrates the importance of considering downstream climate consequences where the applicable environmental-law framework requires it.

6. Administrative Rationality

Net-zero implementation decisions may involve complex economic and technical judgments.

However, complexity does not remove the requirement that public power be exercised rationally.

In Democratic Alliance v President of South Africa, the Constitutional Court developed important principles concerning rationality in the exercise of public power.

Applied to climate implementation, there should be a rational connection between:

the evidence → statutory objectives → chosen climate measure.

For example, if a government claims that a particular electricity intervention will reduce emissions, its decision should be supported by credible evidence showing how the intervention contributes to that objective.

7. Socio-Economic and Just-Transition Concerns

Net-zero implementation can produce significant social and economic consequences.

Coal-dependent communities may face:

employment losses;

reduced local economic activity;

changes in electricity prices;

retraining requirements; and

changes in municipal revenue.

South Africa's Climate Change Act expressly refers to a long-term, just transition toward a low-carbon and climate-resilient economy and society. (Government of South Africa)

Therefore, implementation decisions may increasingly be challenged where decision-makers fail to consider legally relevant socio-economic consequences.

The principle from Fuel Retailers Association of Southern Africa v Director-General: Environmental Management, Mpumalanga is useful here because the Constitutional Court emphasised integrated consideration of environmental and socio-economic factors.

8. Public Participation

Major net-zero decisions can affect:

electricity consumers;

workers;

businesses;

municipalities;

communities;

energy producers; and

landowners.

Where legislation requires consultation or public participation, failure to follow the required process can make a decision vulnerable to review.

Earthlife Africa is again relevant because climate-related environmental decision-making must occur within the applicable environmental assessment and participation framework.

The importance of procedural legality is also illustrated by AllPay Consolidated Investment Holdings v CEO of SASSA, although that case concerned public procurement rather than climate policy.

9. Conflict Between Net Zero and Energy Security

A difficult legal issue arises when emissions reduction objectives conflict with immediate electricity-security concerns.

For example, closing a high-emission power station may reduce emissions but could also affect electricity supply if adequate replacement capacity is unavailable.

In Eskom Holdings SOC Ltd v Vaal River Development Association, the Constitutional Court considered the public importance of electricity supply and the legal consequences of electricity interruptions.

The case was not a net-zero case, but it is relevant by analogy because climate implementation must operate within the wider legal framework governing reliable electricity supply and essential public services.

10. Corporate Net-Zero Decisions

Challenges can also be brought against private companies.

The Dutch Milieudefensie v Royal Dutch Shell litigation is an important example. In 2021, the District Court ordered Shell to reduce its emissions. However, in November 2024, the Hague Court of Appeal overturned that specific reduction order. The Court of Appeal nevertheless stated that Shell has an obligation to reduce its CO₂ emissions, while finding that it could not establish a legally required specific percentage such as 45%. (Rechtspraak)

This case illustrates an important legal difficulty: recognising a climate responsibility does not necessarily mean that a court can determine a precise emissions-reduction target for an individual company.

11. Urgenda and Government Responsibility

The Dutch Urgenda litigation provides another important comparative authority.

In Urgenda Foundation v State of the Netherlands, the Dutch Supreme Court held in 2019 that the Dutch State had to reduce greenhouse-gas emissions by at least 25% by the end of 2020 compared with 1990. (Rechtspraak)

The case demonstrates that climate targets can, in certain legal systems, become subject to judicial enforcement where constitutional or human-rights obligations provide an appropriate legal foundation.

It should not, however, be assumed that the same remedy automatically exists under South African law.

12. Remedies

Where a net-zero implementation decision is unlawful, possible remedies may include:

setting aside the decision;

remitting it to the decision-maker;

requiring reconsideration;

ordering compliance with statutory procedures;

declaring conduct unlawful; or

granting another just and equitable remedy.

Courts may prefer reconsideration by the specialised authority rather than designing the climate policy themselves.

13. Conclusion

Challenges to Net-Zero Implementation Decisions arise mainly from questions of legality, rationality, procedural fairness, environmental assessment, climate obligations, socio-economic impacts and energy security.

Important authorities include:

Earthlife Africa Johannesburg v Minister of Environmental Affairs – relevance of climate impacts to energy-related environmental decisions;

Fuel Retailers Association – integrated environmental and socio-economic decision-making;

Affordable Medicines Trust – lawful exercise of regulatory powers;

Democratic Alliance v President – rationality of public power;

Eskom v Vaal River Development Association – public importance of reliable electricity supply;

Finch v Surrey County Council – downstream greenhouse-gas emissions and environmental assessment; (Supreme Court)

Urgenda – enforceability of governmental climate obligations; (Rechtspraak)

Milieudefensie v Shell – limits and possibilities of corporate climate obligations. (Rechtspraak)

Most of the international cases are comparative authorities rather than binding South African precedent. In South Africa, the Climate Change Act 22 of 2024, together with constitutional administrative-law and environmental principles, provides an increasingly important framework for examining whether net-zero implementation decisions are lawful, evidence-based, procedurally proper, environmentally informed and consistent with the country's transition toward a low-carbon and climate-resilient economy. (Government of South Africa)