Time to treat the climate and nature crisis as one indivisible global health emergency - Kamran Abbasi; Parveen Ali; Virginia Barbour; Thomas Benfield; Kirsten Bibbins-Domingo; Gregory E. Erhabor; Stephen Hancocks; Richard Horton; Laurie Laybourn-Langton; Robert Mash; Peush Sahni; Wadeia Mohammad Sharief; et al. (All Earth, 2023)