Saving the world

I think that earth hour is a good idea. but i personally think that we should go for a whole day with out lights. one hour does not make a difference. we could make a difference by using less electricity during the day we should open the blinds or curtains and open windows for air. like for the buses the they waste so much electricity because they leave there engines on all the time they are waiting to pick us up. They should keep their engines off intill it is just about time to leave. that i how it think we can change.