A study conducted by the University of Southern Queensland in collaboration with the World Meteorological Organisation and the International Centre for Tropical Agriculture has found that climate change is impacting the production of robusta coffee, a variety that accounts for nearly 40% of the world's coffee supply. The research, which analyzed data from nearly 800 robusta coffee farms across South East Asia, discovered that the crop performs best at an average temperature of 20.5 degrees Celsius, rather than the previously assumed optimal range of 22-28 degrees Celsius. Each degree above 20.5 degrees results in a yield decline of around 14 per cent, indicating that robusta coffee is more temperature-sensitive than previously believed. The findings have implications for coffee production and the livelihoods of millions of farmers in South East Asia.