First, i think heat does not get the same kind of attention compared to other climate and weather hazards, because it is largely invisible. and also in this case, we undertake work in singapore and beyond singapore, in southeast asia, looking at workers under extreme conditions, in hope to recommend practical strategies to optimise health and work productivity. and you actually mentioned the physical toll on delivery riders in seoul, the same as on an ultra marathon runner. can you just talk us through? yeah, i think that was quite disturbing on one hand, because coming from a sport science pe...