This document discusses how natural disasters impact ecosystems. It defines natural disasters and lists common types including landslides, droughts, floods, tsunamis, tropical cyclones, lightning, fire, tornadoes, volcanoes, blizzards, earthquakes, and heat waves. For each disaster type, it provides a brief definition and describes how that particular disaster can negatively impact ecosystems through destruction of structures, erosion, loss of habitat, spread of disease, and other effects like power outages and contamination of water supplies. The document aims to explain the various environmental impacts natural disasters can have on ecosystems.