Critical Mass Brighton
- Yahoo! group site for Critical Mass bike rides celebrating cycling and promoting a sustainable alternative to petrol-dependant transport.
- http://groups.yahoo.com/group/criticalmassbrighton/

Brighton Climate Change
- Campaigning locally on the global problem of climate change; information about events, contact details, and resources.
- http://www.brightonclimatechange.org/

Brighton and Hove Astronomical Society
- Provides newsletters, images, and links.
- http://www.bhas.fsnet.co.uk/

Low Carbon Network
- A non-profit organisation aimed at raising awareness of the links between buildings, the working and living patterns they support and global warming. Lists supportive organisations and provides a discussion forum.
- http://www.lowcarbon.co.uk/

Brighton Permaculture
- Charitable Trust running courses and events about practical ecological strategies for land, water, buildings, people and communities.
- http://www.brightonpermaculture.co.uk/