There is nothing wrong with eating fish as long as you do so in a sustainable manner. In many respects fish is a demonstrably much healthier option for you and the planet than meat, especially red meat.
Sure, I know in an ideal world we are all supposed to become tree-hugging vegans. But if the entire world switched 100% to vegetables you would soon find there are environmental and sustainable issues there. Its one thing growing a few carrots in your back garden, its another doing so on an industrial scale.
So its not so much what you eat, but the sustainability of it. The answer is not so black and white.
Sure, I know in an ideal world we are all supposed to become tree-hugging vegans. But if the entire world switched 100% to vegetables you would soon find there are environmental and sustainable issues there. Its one thing growing a few carrots in your back garden, its another doing so on an industrial scale.
So its not so much what you eat, but the sustainability of it. The answer is not so black and white.