A new paper by Wenju Cai and Tim Cowan at CSIRO in Victoria argues that anthropogenic climate change can explain some, but not all, of the marked decline in rainfall over the last half century in southwest Western Australia: “An ensemble result from 71 experiments reveals that anthropogenic forcing contributes to about 50% of the observed rainfall decline…. Our result suggests that other forcing factors must be invoked to fully account for the observed rainfall reduction.”