Day_14 shows disasters can be categorized into natural, technological, and human-made disasters. Natural disasters can be considered the relationship between human and nature. Technological disasters are coming from the interactions between human and technology which people created. The conflicts between human and human make human-made disasters. This idea is the base for understanding the natural disasters. The 2011 Fukushima nuclear plant issue is a technological disaster with a natural disaster, so we can call it a complex disaster. These understandings are based on what I learned before.