Not just sand and fish in the sea... sadly.

There's also a truly appalling amount of plastic. All oceans and seas are affected but unfortunately the Mediterranean is right up at the top in terms of sheer quantity. Not a ranking where you want to be number I.

Gravity Wave is a social start-up based in Spain. It focuses on working with small-scale fishermen to collect as much as possible of the plastic waste fouling the Mediterranean, from water bottles to a whole load of discarded fishing nets.

It takes money to do this though, and the start-up has come up with a couple of ways to finance its operations. It works with companies, leveraging their need for genuine green credentials to attract customers. Gravity Wave offers a scheme whereby companies can offset their own carbon footprint by collecting a given amount of plastic.

The project also makes designer furniture from the plastic collected, and puts it up for sale.

Plastic waste and the resulting microplastic is a major environmental problem: Gravity Wave has come up with a circular way to counter it while raising awareness about the issue.