and, finally, something akin to the debris left on mount everest by climbers, there have been coils ofe bottom of the marianas trench as well, and those are left over apparently from robotic scientific vehicles that send their data to the surface through these very fine fibre—optic tethers which, when they become 11, 12, 13 kilometres long, often times are cut loose in jettison rather than trying to haul them back in. i cannot imagine anything more depressing than learning that there is human detritus at those very deepest levels of the ocean. i'm just wondering, as a final thought, where do you believe human beings should put their priorities right now? because we live in a world, clearly, where resources are very finite and they have to be rationed. should we be focusing most of our efforts on doing what it takes, spending what it takes, to clean up our planet, our oceans, decarbonise, do everything necessary to give us a sustainable future here on earth or do you believe we should be pouring very significant resources into that effort that we have discussed, to get human beings furt