SUSTAINABILITY ASSESSMENTS OF ELECTRICITY PROJECTS

1. Legal Framework

In the United Kingdom, sustainability assessment of electricity projects is not confined to a single statutory test. It operates through a combination of Environmental Impact Assessment (EIA), Strategic Environmental Assessment (SEA), habitats protection, climate-change duties, planning controls, environmental permitting, and public consultation. For electricity infrastructure in England and Wales, the Electricity Works (Environmental Impact Assessment) Regulations 2017 require assessment of projects such as generating stations and overhead electricity lines where the statutory thresholds and criteria are met. The assessment must address environmental effects including biodiversity, population, human health, land, soil, water, air, climate, cultural heritage and landscape. It must also consider resource use, pollution, accidents, cumulative effects and the project's vulnerability to climate change.

2. Meaning and Purpose of Sustainability Assessment

Sustainability assessment asks whether an electricity project can be developed and operated while appropriately accounting for its environmental, climate, resource, social and economic consequences. In practice, this requires consideration of alternatives, baseline environmental conditions, cumulative impacts, mitigation measures and long-term consequences.

For renewable projects such as offshore wind, onshore wind, solar generation and battery storage, assessment may examine land or seabed disturbance, biodiversity, visual effects, marine ecology, construction emissions, grid infrastructure, waste and decommissioning. For thermal or fossil-fuel projects, greenhouse-gas emissions and climate consequences become particularly significant.

The assessment does not necessarily prohibit development causing environmental harm. Rather, EIA is designed to ensure that environmental consequences are identified, publicly considered and incorporated into the competent authority's decision.

3. Climate Change and Net-Zero Assessment

The Climate Change Act 2008 provides the wider statutory context. It establishes the UK's net-zero framework and carbon budgets, requiring government policies to be directed toward meeting legally established carbon targets. Consequently, major electricity projects increasingly require assessment of both their contribution to greenhouse-gas emissions and their resilience to future climate conditions.

A sustainability assessment should therefore consider the project's whole operational life: construction, operation, transmission connections, resource consumption, maintenance and decommissioning. Where legally relevant and sufficiently connected to the project, indirect effects can also require assessment.

4. Case Law — R (Finch) v Surrey County Council [2024] UKSC 20

Case Name/Citation: R (on the application of Finch on behalf of the Weald Action Group) v Surrey County Council [2024] UKSC 20.

Facts: Planning permission was granted for an oil-extraction project. The environmental statement assessed direct greenhouse-gas emissions from the site but excluded emissions arising from combustion of the extracted oil.

Legal Issue: Whether downstream combustion emissions could constitute indirect effects of the project requiring assessment under the EIA regime.

Judgment: The Supreme Court held that the council's approach was unlawful because the EIA had failed to assess relevant indirect climate effects. The statutory EIA framework requires consideration of direct and indirect significant effects, including effects on climate.

Legal Principle/Ratio: Sustainability and climate assessment cannot necessarily be artificially confined to emissions physically occurring inside the project's boundary. The legally relevant question is whether the effects are sufficiently connected to the project and fall within the statutory assessment requirements.

Significance: Finch substantially reinforces the importance of climate consequences in project assessment. It demonstrates that an environmental statement must contain information capable of enabling the authority to reach a properly informed and reasoned conclusion.

5. Case Law — R (Friends of the Earth) v Secretary of State for BEIS [2022] EWHC 1841 (Admin)

Case Name/Citation: R (Friends of the Earth Ltd) v Secretary of State for Business, Energy and Industrial Strategy [2022] EWHC 1841 (Admin).

Facts: The claim concerned governmental policies and proposals for achieving statutory carbon budgets under the Climate Change Act 2008.

Legal Issue: Whether the statutory framework required adequate consideration of information relevant to achieving legally binding carbon budgets.

Judgment: The High Court examined the statutory importance of the carbon budgets and the Secretary of State's duties concerning policies and proposals for meeting them.

Legal Principle/Ratio: Climate policy must be considered within the statutory framework established by the Climate Change Act, rather than treated merely as an optional policy consideration.

Significance: The case illustrates how climate objectives can become legally relevant to energy-system decision-making.

6. Sustainability Factors in Electricity Projects

A robust assessment should ordinarily address:

greenhouse-gas emissions and climate adaptation;

biodiversity and protected habitats;

water, soil and land use;

cumulative and transboundary impacts;

landscape and visual effects;

construction and operational pollution;

resource efficiency and material use;

waste and eventual decommissioning;

grid connection and associated infrastructure;

public participation and environmental information;

reasonable technological, locational and design alternatives; and

mitigation, monitoring and enforcement arrangements.

7. Legal Significance

Sustainability assessment has therefore become an important mechanism for integrating energy security, decarbonisation, environmental protection and long-term infrastructure resilience. For electricity projects, the central legal requirement is not simply to demonstrate that a project is labelled “sustainable”, but to provide sufficiently comprehensive environmental information for the competent authority and the public to understand its significant consequences. The modern approach, particularly after Finch, places considerable importance on the quality, completeness and causal scope of climate and environmental assessment before development consent is granted.