A propos of silverfox's post - an important one - try reading Sustainable Energy without the Hot Air by Prof David McKay. It's a lightly written (though lots of figures) down to earth assessment of what really matters and what is practicable in teh way of alternative energy and savings, rather than the emotional statements and responses we too often get. Too many "facts" are trotted out in teh papers and on air which are unsubstantiated at best, and often based on different assumptions. I wasn't there to sign up last week, but I've dusted my bike down, turn off more lights and put machines off inseat of on standby when we're out and at night. We have also installed solar water heating (not cheap but there are grants) which at this time of year is very effective.