 So our listener Luke wants to know if all this turbulence is increasing. Paul says the data for mountain and storm-related turbulence is still unclear. But for the invisible clear air turbulence, we now have over a decade's worth of scientific research. And yes, indeed, it has been increasing. And yes, I'll pre-empt you before you ask the question. It is climate change. We can blame the increase confidently now on climate change.