Original sentence: 1980 eruption of Mount St.2004 Indian Ocean earthquake.:Category:Disasters.:Category:Oil spills.An environmental disaster may be due to a natural event or due to human activity.It can involve mass-killing of animals (including humans) and plant systems, or severe disruption of human life requiring mass migration.See also: List of past tsunamis.The impact of humans alteration of the ecosystem that has widespread or long lasting consequences.The list would be numerous but would include:.This could include the following:
Edited sentence: Examples of disasters include:.Man-made negative alteration of the ecosystem that has widespread or long lasting consequences.Usually involves mass-killing of animals and plant systems, and frequently can include mass-killing of human beings, or severe disruption of human life requiring mass migration