arcticregions canada detergentpollutionofthesea effectofoilspillson effectofwaterpollutionon englishchannel environmentalaspects environmentalprotection etc fisheries fishes harbors lawandlegislation marineanimals marinebiology marinehabitats marinepollution maritimelaw northamerica oilspills oilspillsandwildlife pollution remotesensing territorialwaters torreycanyon(ship) unitedstates wa689p738t1968 water waterpollution