What does the future hold for our lakes globally—clear waters or widespread algal blooms? A new study is the first to model and project algal blooms on a global scale under different socio-economic and climate scenarios. Conducted by the UK Centre for Ecology & Hydrology, Wageningen University & Research, and NIOO-KNAW, the research offers new insights into how ecosystems may be affected and the role we play in shaping that future.