National Grid plc

Does the core business genuinely avoid or reduce emissions, or build climate resilience? Share of revenue that is actually 'green'. Fossil-dependent models score low.

The core electricity transmission business genuinely enables renewable grid integration — National Grid added 1.35 GW of low-carbon capacity in FY24 alone — but the US gas distribution business is a material emissions source, with Scope 1 methane leaks and ~28.4 billion kg CO2e in Scope 3 emissions (largely sold gas) reported in 2025, significantly diluting the net climate impact.

Credible, science-based targets (SBTi), a real net-zero plan with progress to date, and CDP disclosure — not just a dated press release.

National Grid holds SBTi-validated near-term targets (60% absolute Scope 1&2 reduction by 2030/31 on a 2018 base aligned to 1.5°C; 37.5% Scope 3 reduction by 2033/34 aligned to well-below 2°C) and a group-level net-zero-by-2050 commitment, with progress reported annually; these are credible and third-party validated, though the Scope 3 gas-sold target is weaker than the Scope 1/2 pathway.

Operational footprint, labour and social practices, and governance quality across the company's own operations and supply chain.

Sustainalytics rates National Grid at a low-risk ESG score of 16.1, placing it as a leader among 139 utilities peers; the company reports under GRI Standards (FY25 disclosure confirmed), has board-level Safety & Sustainability Committee oversight, and ranks 2nd in the UK for gender equality per Equileap, though ongoing methane-leak litigation in the US and historic regulatory penalties weigh on the social/governance dimension.

Quality of disclosure, independent third-party verification, and how much hard data backs the company's claims.

National Grid discloses against CDP (A- in 2025, and multiple consecutive A-list appearances since 2016), GRI Standards, SASB, TCFD, and EU Taxonomy; emissions data for Scopes 1, 2, and 3 are published annually with third-party assurance and a Green Financing Framework independently assessed by a second-party opinion provider, representing sector-leading disclosure depth.

Controversies, litigation, pollution, fossil-fuel lobbying, conflict-zone involvement and governance scandals. Higher means cleaner.

The Conservation Law Foundation filed a notice of intent to sue National Grid in August 2024 over hazardous methane leaks from aging Massachusetts pipelines (15 sites identified as imminent explosion hazards, potential fines up to ~$90,702/day/violation); this follows older UK regulatory penalties (£15m competition fine, £8m Ofgem mains-data misreporting fine), indicating a pattern of compliance gaps in the gas business that moderately impair integrity.