Andrea Ghermandi, Johannes Langemeyer, Derek Van Berkel, Fulvia Calcagni, Yaella Depietri, Lukas Egarter Vigl, Nathan Fox, Ilan Havinga, Hieronymus Jäger, Nina N. Kaiser, Oleksandr Karasov, Timon McPhearson, Simone Podschun, Ana Ruiz-Frau, Michael Sinclair, Markus Venohr, Spencer A. Wood

• Social media data are transforming sustainability science. However, challenges from restrictions in data accessibility and ethical concerns regarding potential data misuse have threatened this nascent field. Here, we review the literature on the use of social media data in environmental and sustainability research. We find that they can play a novel and irreplaceable role in achieving the UN Sustainable Development Goals by allowing a nuanced understanding of human-nature interactions at scale, observing the dynamics of social-ecological change, and investigating the co-construction of nature values. We reveal threats to data access and highlight scientific responsibility to address trade-offs between research transparency and privacy protection, while promoting inclusivity. This contributes to a wider societal debate of social media data for sustainability science and for the common good.