Last year I posted on Earth Hour an in the run up to the Copenhagen summit on Climate Change, I hope that more and more will join in. As well as individuals and public authorities, many high profile businesses are now getting involved.
It's easy - just turn off your lights for an hour on 16 December at 19.00.
Not much to ask - but a way to send a message that we want the carbon reductions needed to be enforced internationally. And a clear statement from the developed world that we understand we need to reduce our emissions hugely.