The Montana Supreme Court on Wednesday upheld a district court ruling in the nation’s first constitutional climate change trial, affirming that the youth plaintiffs have a “fundamental constitutional right to a clean and healthful environment” while revoking two state laws, The Daily Montanan reports.

The 70-page decision, authored by Chief Justice Mike McGrath, comes 16 months after Lewis and Clark District Court Judge Kathy Seeley ruled in the landmark Held v. Montana lawsuit, explicitly stating that the state’s greenhouse gas emissions are “proven to be a substantial factor in causing climate impacts to Montana’s environment, and harm and injury to the youth plaintiffs.”