Some of the threats posed by climate change can appear rather esoteric or abstract. One of these is ocean acidification – it is not immediately obvious why we should care. A recent paper by Sara Cooley and colleagues give a good example of why the threat of changing ocean chemistry matters.
There is something circular about the idea of catching fish to use as feed for farmed fish, livestock, poultry and our pets. And with about one third of the global fish catch going in this direction, most of it destined for aquaculture, you might well ask whether growing the farmed fish to put in your supermarket has deprived a hungry or malnourished person of food.