An oil slick stretching nearly the length of Yemen’s Red Sea coast was spotted after a Houthi attack damaged a crude tanker, the Conflict and Environment Observatory said Wednesday. Satellite imagery from the European Space Agency showed the slick on Tuesday near the location of the Houthi attack on the Chios Lion vessel, said CEOBS, a UK charity which monitors the environmental impact of conflict. The apparent slick, measuring 220 kilometres (135 miles) long, suggested the “damaged vessel was releasing oil”, it said on social media platform X. The Liberia-flagged oil tanker Chios Lion was att…