Taiwan’s highest administrative court has rejected an appeal of the island’s first climate lawsuit, ending a five-year legal challenge by environmental groups who argued that government rules requiring large electricity users to adopt renewable energy were too weak to drive meaningful emissions reductions.
The ruling, issued last week by the Supreme Administrative Court, upheld a lower court decision dismissing the case brought by environmental groups including Greenpeace and the Environmental Jurists Association.
The lawsuit targeted provisions under Taiwan’s Renewable Energy Development Act, commonly known as the “large electricity user clause,” which took effect in 2021 and requires major power consumers to assume responsibility for renewable energy use.
Under regulations set by the Ministry of Economic Affairs, companies with contracted electricity capacity of at least 5,000 kilowatts (kW) must, within five years, install renewable energy generation capacity equivalent to 10 per cent of their contracted capacity. If not, they must or meet the requirement through alternatives such as energy storage systems, renewable electricity purchases or payment of a government fee.
Environmental groups argued the requirements were too lenient and would not effectively compel corporations to reduce carbon emissions.
They filed an administrative lawsuit against the ministry in February 2021, marking Taiwan’s first climate litigation case.
The Taipei High Administrative Court initially dismissed the case on procedural grounds. After an appeal, the Supreme Administrative Court ordered a retrial.
In August 2025, the lower court again dismissed the case, ruling that citizens and civil society groups had the right to propose regulatory changes but did not possess a legal right to demand them. The Supreme Administrative Court upheld that ruling this month.
Greenpeace said it was disappointed by the outcome, arguing that while the court’s decision focused on the government’s regulatory discretion, it failed to address whether the policy was sufficient to drive corporate decarbonisation.
Ahead of court proceedings in 2023, environmental groups had called on the government to publish a list of major electricity users, raise renewable energy obligations from 10 per cent to 20 per cent of electricity consumption and lower the eligibility threshold from 5,000 kW to 800 kW.
They also argued that companies should be required to install a minimum proportion of rooftop solar power before being allowed to meet their obligations through renewable energy certificates.
The ruling comes as Taiwan faces growing challenges in meeting its climate goals. The government earlier said that it was likely to fall short of its target of reducing greenhouse gas emissions by 10 per cent by 2025, with current estimates pointing to a reduction of about 9 per cent.
Greenpeace said the shortfall reinforced concerns that environmental groups had raised throughout the litigation. The organisation also pointed to government carbon fee data showing that semiconductor companies accounted for about 40 per cent of carbon fee payments, highlighting the significant energy consumption and emissions associated with Taiwan’s high-tech industries and rapidly expanding artificial intelligence supply chains.
The group added current policies were ill-equipped to cope with rising electricity demand driven by semiconductor manufacturing and AI development, and pledged to continue lobbying lawmakers to strengthen renewable energy obligations and monitor the government’s biennial review of the regulations.
The Environmental Jurists Association said the court’s ruling ended the legal proceedings but did not resolve what it described as fundamental flaws in the policy.
“The conclusion of the judicial process does not mean the problems with the current system have been solved,” the group said in a statement, arguing that the regulations remain too weak to require major electricity users and high-emitting companies to take meaningful responsibility for reducing emissions.
The group said recent government projections that Taiwan may miss its 2025 emissions reduction target due to rising industrial electricity consumption underscored concerns raised throughout the lawsuit.
It also pointed to data showing semiconductor firms accounted for about 40 per cent of carbon fee payments, arguing that rapidly expanding high-tech and AI-related industries were increasing pressure on Taiwan’s energy transition efforts.
The association said it would continue to monitor legislative efforts to amend the regulations and push for stricter obligations on major electricity consumers.
Taiwan has set a goal of achieving net zero emissions by 2050, but balancing growing electricity demand from its technology sector with climate and energy transition targets remains a major challenge for policymakers.
