A US Judge in Montana has ruled in favour of 16 climate youth activists, finding that the state violated their right to a “clean and healthful environment”, which the state constitution guarantees. The litigants had claimed that GHG emissions contribute to hotter temperatures and more wildfires, which in turn was harming their physical and mental health. The state had argued that reducing Montana’s GHG emissions would make little difference to the climate crisis given that other countries and states were still contributing to climate change.