A disaster is an effect of a natural hazard (e.g. flood, storm, volcanic eruption, earthquake, or landslide) that can affect the environment, and lead to financial, environmental, and schools, and/or people. Damage from natural disasters depends on people's ability to withstand and recover from disasters. This understanding is concentrated in the formula: "disaster occurs when risk is accompanied by the vulnerability." A natural hazard therefore cannot lead to a natural disaster in non-vulnerable areas, for example, large earthquakes in uninhabited areas. The term nature has thus been contested because events are simply not risks or disasters if they do not involve humans.