environmentalaspects environmentallaw environmentalriskassessment hazardoussubstances lawandlegislation liabilityforenvironmentaldamages liabilityforhazardoussubstancespollutiondamages liabilityforoilpollutiondamages management oecdcountries oilpollutionofthesea oilspills oilstoragetanks pollution risk(insurance) unitedstates