Answer Earthquakes, floods, volcanic eruptions, landslides, fires, spontaneous tree limbs falling, winds, hurricanes, tornadoes, ice storms... Natural calamities are occu
…rences, events or phenomenon that happen in nature of their own accord.or because of man(the use of celltowers,vehicles also cause damage to air)so these may occur NEXT ANSWER A- natural- disaster- is the effect of a natural hazard- (e.g. flood, tornado, hurricane, volcanic eruption, earthquake, or landslide) that affects the environment, and leads to financial, environmental and/or human losses. The resulting loss depends on the capacity of the population to support or resist the disaster, and their resilience.This understanding is - concentrated in the formulation: "disasters occur when hazards meet vulnerability." A natural hazard will hence never result in a natural disaster in areas without vulnerability, e.g. strong earthquakes in uninhabited areas. The term natural has consequently been disputed because the events simply are not hazards or disasters without human involvement. (MORE) 
