影像來源／“Rocky Mountain Subalpine Forests Now Burning More Than Any Time in Recent Millennia,” by Philip E. Higuera, Bryan N. Shuman and Kyra D. Wolf, in Proceedings of the National Academy of Sciences USA, Vol. 118, No. 25; June 14, 2021; Dryad https://doi.org/10.5061/dryad.rfj6q579n (data and code for study) Graphic by Amanda Montañez
