US Chief Justice Roberts on Friday ordered a temporary hold on a climate change lawsuit until the plaintiffs provide a response to the government.

The plaintiffs have until Wednesday to provide a response to the Department of Justice’s stay request.

The case, Juliana v. US, was originally filed in the US District Court for the District of Oregon in 2015. The plaintiffs are a group of 21 young activists, as well as the group Earth Guardians. The “complaint asserts that, through the government’s affirmative actions that cause climate change, it has violated the youngest generation’s constitutional rights to life, liberty, and property, as well as failed to protect essential public trust resources.” In filing the suit, the plaintiffs are asking the court to order the government “to prepare and implement an enforceable national remedial plan to phase out fossil fuel emissions and draw down excess atmospheric CO2 so as to stabilize the climate system and protect the vital resources on which Plaintiffs now and in the future will depend.”

Last week the judge ruled that the case could proceed against the government but not against President Donald Trump.