The Supreme Court concluded that Ireland’s 2017 National Mitigation Plan did not contain enough detail to meet the requirements of the Climate Action and Low Carbon Development Act 2015. Chief Justice Frank Clarke said the plan should be quashed because it did not adequately explain how the State intended to meet its statutory climate objective by 2050.
The case was an appeal by Friends of the Irish Environment CLG (FIE) against the High Court’s dismissal of its challenge. FIE argued that the plan was unlawful under the 2015 Act and breached rights protected by the Constitution and the European Convention on Human Rights. The Government disputed those claims.
Clarke said the Act required a plan covering the full period to 2050, with enough specificity for an interested member of the public to assess whether the proposed approach was realistic. He accepted that detail for later years could be less complete and that plans could be updated as knowledge and technology developed. But he found that too much of the plan relied on further study or investigation, and that significant parts of its proposed measures were vague or aspirational.
The Court treated whether the plan met the Act’s statutory requirements as a justiciable question of law, while recognising that choices about which policies to adopt could remain matters for government. It rejected the Government’s argument that FIE’s statutory challenge was an impermissible collateral attack on the Act itself. The judgment also said the 2019 Climate Action Plan did not replace the formal plan required under the 2015 Act because it had not gone through that Act’s public consultation process.
The judgment separately concluded that FIE, as a corporate body, lacked standing to pursue claims based on personal rights to life and bodily integrity that it did not itself possess, under either the Constitution or the 2003 Act. The Court said the case had not shown that individuals could not bring such claims or that refusing FIE standing would make enforcement of important rights impossible or excessively difficult.
Clarke expressed the view that a standalone constitutional right to a healthy environment, as framed in the case, was either unnecessary if it added nothing to existing rights or too vague to derive from the Constitution. He did not rule out constitutional rights or obligations having a role in environmental cases where they are properly raised.
The text supplied is Clarke’s judgment, which concludes that he proposed the plan be quashed. It does not include a separate formal order or the other judges’ reasons, so the precise final order and the Court’s overall disposition are not established by this source alone.