How many years plastic bottles can be decompose?

An average time for a plastic bottle to biodegrade fully is approximately 450-1000 years. However, there are many different kinds of plastic in the world, most commonly the hard and reusable ones, which take a longer time, and the soft and non-reusable ones, which take a shorter time. Time also varies with the size of the bottle. If they are sitting in landfills sealed and compacted with all of the other trash and bottles with no air moving, they won't decompose at all.
a standard PETE plastic bottle will never rot.