Hurricanes and other adverse weather conditions a Geological complexities and water depths associated with such operations a Limited number of partners available to participate in projects a lack of compliance with environmental laws and regulations a lack of oil field service costs and availability a lack of compliance with environmental safety and other laws and regulations a Terrorist attack or piracy a Terrorist attack or a Remediation and other costs and regulatory changes resulting from oil spills or hazardous materials a failure of equipment and facilities and a Response capabilities a failure of equipment and other environmental problems.