ICEBERGS

 
In those days Icebergs formed of fresh water that breaks of from various glaciers. These are formed in polar regions where you can find a huge snowfall lasting for more than many centuries. These icebergs doesn’t melt and these are compressed onto ice. It is formed from the tide water glaciers. The snow becomes compressed and it looks to be firm and transformed into a dense ice. But now-a-days these icebergs are melting because of global warming. This is not going to be a good sign as it increases the sea level which will ultimately lead to demolition of earth.