You may have noticed that lately we’ve been plastering the school in posters featuring Swedish teen climate change campaigner Greta Thunberg and asking you all to help us make ecobricks.

But what is an ecobrick? And why do we want your rubbish to make them?

An ecobrick is a building block made entirely from unrecyclable plastic. It’s created by filling a plastic bottle with clean, dry plastic until it’s packed tightly and can be used as a building block.

That’s why we’re asking you for your food wrappers – chocolate or fruit bar wrappers, crisp packets, the clear plastic used to cover fruit and vegetables, plastic bags for bread, and so on. Basically anything that is single use plastic that you’d normally throw away can be put into an ecobrick and become something useful rather than going into landfill or – worse – the ocean.

And yes, it may sound a bit gross to keep rubbish that you’d normally throw away. But if we’re going to help the planet we all need to do our bit, and this is really easy. And your hands are perfectly washable.

What are we going to use them for? Ecobricks can be used in building projects, as if the bottle is packed hard enough it becomes rigid and strong, and is also naturally insulating. We can send the St Laurence School ecobricks to developing countries to make furniture or buildings, or if anyone has a great idea for something we could construct at school from them we’d love to hear it.

So please, do your bit to help the planet at school and bring us your food wrappers and plastic bottles to the ILC so we can work on this project together.