A federal appeals court ruled Wednesday in favor of 21 children and young adults suing the U.S. government for not doing enough to protect their constitutional right to a stable climate. The Ninth Circuit Court of Appeals judges refused to grant mandamus relief and block the U.S. District Court in Oregon from hearing the suit, which was originally filed by the environmental group Our Children’s Trust in 2015. A federal judge in Oregon ruled in 2016 the 21 youngsters had standing to sue. President Donald Trump’s administration and oil and gas groups appealed the decision in June 2017. They asked...