Using heavy nets to scrape the ocean floor, bottom trawling is described as being "destructive for both ocean life and the climate," destroying an area of the ocean floor nearly as large as the Amazon rainforest every year. Despite its effects on marine organisms and the environment, the practice still provides over a quarter of fishery catches around the world. Learn more: https://on.natgeo.com/44fuiFj Ocean with David Attenborough is now streaming on Disney and Hulu. | National Geographic