Dude... plastic takes a long time to decompose... What science says is simple... The heat bcoz the heat from the sun as well as the CO2 we emit is getting trapped in our atmosphere which is causing the polar caps to melt.. that causes raise in sea levels.
molecules expand when heated. and due to the heat the dippression we see in bay of bengal, or Indian Ocean increases.. Look at last years mumbai floods or hurricane katrina.
The fact is climate change does not cause natural disaster but only adds fuel to the fire like making a hurricane or typhoon much powerful.
A scientist can explain much better than me.. But that is the science claim.
