Here are a few videos, which will help you understand the various causes of disasters. Go through them today:

https://www.youtube.com/watch?v=ep2YY_D7wdk 

 

https://www.youtube.com/watch?v=4ovHfKEnOmw

https://www.youtube.com/watch?v=3FM4E19PZhw

https://www.youtube.com/watch?v=bG37DEAb3Bc

https://www.youtube.com/watch?v=8GN2GcDn70g

https://www.youtube.com/watch?v=qgont5jQjcQ

https://www.youtube.com/watch?v=mRB9byAQLvg

https://www.youtube.com/watch?v=IOIV7Aulty4