A couple of points: bottom trawling is no worse than forest clear cutting or burning down rainforests. North America was covered with forests as little as 300 years ago and most of it is now gone. In South America, Africa and Asia the tropical rainforests are slowly disappearing. Humans have burned about 50% of the fossil fuels in the earth. The end result will be a cataclysmic end to the human race when we can no longer sustain the food and energy requirements to feed 6+ billion people. When the humans die off, the non-human plant and animal species will return. It may take a million years or more for the full diversity to manifest itself, but it will happen. The rise of the human race is but a blip in the life cycle of the earth, and though we've scorched it pretty well, once we're gone, nature will continue on quite nicely without us, thank-you.