The science-policy interface on ecosystems and people: challenges and opportunities. Issue 1 (1st January 2020) - Balvanera, Patricia; Jacobs, Sander; Nagendra, Harini; O'Farrell, Patrick; Bridgewater, Peter; Crouzat, Emilie; Dendoncker, Nicolas; Goodwin, Sean; Gustafsson, Karin M.; Kadykalo, Andrew N.; Krug, Cornelia B.; Matuk, Fernanda Ayaviri; et al.