Enviros are warning that Britain’s culinary claim to fame, fish and chips, could disappear unless the nation does a better job of managing its marine resources. The World Wildlife Fund says stocks of cod, the traditional accompaniment to fried potatoes, are being severely depleted because of overfishing, pollution, and rising ocean temperatures. The group is calling for some sea areas to be put off-limits to fishing boats. WWF’s Matthew Davis: “This isn’t just a threat to ocean wildlife, it’s a threat to our cultural heritage.”