Iain got involved in a school project to clean up the beaches where he lives in Shetland.
He explains the suggestions he and his classmates have come up with to try and deal with marine litter.
"My class became concerned about the amount of litter washing up on Shetland so we decided to do some beach surveys.
By studying what had washed up on the beach we found that a lot of waste was washing up from places like America, Germany and Spain.
Lots of it had been dumped in the sea and had drifted onto the beach.
As well as a lot of packaging and fishing waste we found all sorts of things including, toys, lighters, bottles and rope.
After cleaning up the beaches we went back to the same spots a few weeks later and found that there was much less rubbish which suggested it had built up over the years.
We also learnt how marine life is affected by the waste in the water.