The Eden Project in Cornwall, is the World's largest greenhouse. You must have seen or heard about it; the large artifical biomes house an amazing variety of plants and species from around the World, and it's regularly voted as one of the UK's best tourist
attractions. They also run many projects as an educational charity and social enterprise, for example the Eden Project Shop, which prides itself on using local supplies for materials and and supplying predominantly organic, ethical and sustainable products. Any purchase from their shop, means you're supporting their work and educational programmes, which is a fantastic thing.