Tops and Bottoms?

A report by more than 20 marine specialists has calculated that bottom trawling, releases as much carbon as does air travel (https://www.theguardian.com/environment/2021/mar/17/trawling-for-fish-releases-as-much-carbon-as-air-travel-report-finds-climate-crisis). Bottom trawling is a highly destructive mode of fishing involving the dragging of heavy nets along the seabed. It not only destroys environments, it releases carbon from the seabed sediment. The seabed is an important carbon sink. The authors of the study calculate that a gigaton of carbon is released in this fashion each year (as much as by aviation). The released carbon, increases ocean acidification, with damaging effects on productivity and biodiversity. We really need to take all human activities into account, when attempting to arrive at carbon zero! Bottom trawling has, thus far, entirely escaped attention, in terms of its effects on carbon release.