The U.S. Supreme Court this week declined to take up a closely watched lawsuit brought by 21 young people challenging the federal government’s fossil fuel energy system.

The high court’s decision Monday in Juliana v. United States ends a 10-year legal effort to hold the government accountable for knowingly endorsing an energy system that would destabilize the climate. The complaint claimed the situation infringed on the young plaintiffs’ rights to life, liberty and property and called on the government to phase out carbon emissions and implement national plans to address the energy and environmental problems they created.

The Supreme Court offered no reason for declining Juliana. Rodgers said the organization was considering options. The Justice Department did not respond to a request for comment.