I love this stamp, from a while back in Taiwan, encouraging people to reduce both water and electric usage. Save our natural resources!
Here in Japan, because of the threat of power blackouts from Tokyo's over-reliance on the nuclear plant which was damaged by a tsunami which followed the March 11 earthquake, everyone has become quite conscious about saving electricity.
That is great and I am happy to see so many examples in everyday life. But I think that feeling will fade soon. It is always good to conserve electricity, not just due to a temporary threat of black-out. And the same with water.