Dee a n'ihu maka paragraf a - Mkpa ikpe ọmụmụ na HRO nnyocha na-agụnye ma ọmụmụ nke ọdachi (eg, Three Mile Island nuclear merenụ
, ọdachi Challenger na Columbia Disaster, Bhopal chemical leak, Tenerife air crash, Mann Gulch forest fire, Black Hawk friendly fire incident in Iraq) na HROs dị ka usoro nchịkwa ikuku, ụgbọ elu ụgbọ mmiri, na ọrụ ike nuklia.