Earth Hour was a tremendous success as many people participated. Cities turned down the lights of their monuments and the pictures of the event are amazing and totally illustrate how much energy and money we could save.
The Boston Globe proposed a series of 17 great pictures illustrating the phenomenon. Instead of turning down all those lights one hour per year, couldn’t we do this every night after 10 pm or midnight ?
This would make two to three thousand hours and subsequent savings in money and greenhouse gases. Another plus would be darker skies. What do you think ?