If you've got a bit of cash to spare and are interested in helping the cause of renewables, you could do worse than stick £250 in a share issue like Hydro Electric Scheme for Settle, as mentioned in today's Guardian.
Sure, you can invest in various companies that deal in renewables in stock exchanges around the world (including the Global Clean Energy iShare, which spreads your risk amongst 30 companies - unfortunately mostly based in the US), but - and maybe this betrays a lack of understanding as to how shares work - I don't see how this translates into new reneables projects on the ground.
A more direct form of action is to install some renewable tech yourself. Those lovely people at Ebico pay me 20p (the site still says 18p but it's 20p now, honest) per kWh of electricity that I export back to the grid from the solar panels on my roof (installed by the helpful and expert folk at Solstice Energy). Just don't go down this path expecting it to make money, it's strictly for the obsessively geeky ;)
