We can't control the natural calamities. The reason for the natural calamities can be human or the nature. But the human calamities are calamities which occur because of the human activities on the earth. The increased pollution is the main cause of the climate change which can be taken as a human calamities. There are natural causes also for climate change. The flood, earthquakes etc. are the calamities which can be because of the natural and the human reasons.