By a 3-0 vote, the 9th US Circuit Court of Appeals in San Francisco rejected the government’s bid to halt a lawsuit by young people claiming that President Donald Trump and his administration are violating their constitutional rights by ignoring the harms caused by climate change. The twenty-one plaintiffs, now aged 10 to 21, accused federal officials and oil industry executives of knowing for decades that carbon dioxide emissions from the burning of fossil fuels destabilize the climate, but refusing to do anything about it. The decision to allow the case to continue marks the first time climate science and the government’s role in it is going on trial in a US court.