Center for Alternative Technology
http://www.cat.org.uk/

They offer solutions to some of the most serious challenges facing our planet and the human race, such as climate change, pollution and the waste of precious resources. They demonstrate practical ways of addressing these problems. Leading by example, they aim to show that living more sustainably is not only easy to attain but can provide a better quality of life. Their Visitor Centre is open seven days a week. Interactive displays show global issues such as energy generation and transport, and practical, everyday solutions for everyone. CAT also runs a free information service, answering enquiries on a massive range of topics by phone, letter or email, five days a week. For bigger projects, there is also a consultancy service.