Pedzisa mutsara unotevera: Kuneta kunokonzerwa nebasa rokuchinja kwakakonzera njodzi dzinoverengeka dzebasa, kusanganisira
Tsaona yeThree Mile Island, tsaona yeSpace Shuttle Challenger uye tsaona yeChernobyl. Mushumo wokupedzisira weAlaska Oil Spill Commission pamusoro penjodzi ye"Exxon Valdez" yakaratidza kuti "zvinogoneka" kuti maawa okushanda akawandisa akaita kuti vashandi vanete, izvo zvakaitawo kuti ngarava yacho itange kumira.