Although I'm a year late, I had to share this ad.
It was crafted by Leo Burnett, Sydney for 2011's WWF Earth Hour and aired in Australia and New Zealand.
An astonishingly simple insight, this ad does everything it needs to to highlight the upcoming Earth Hour by using an excellent and humourous execution.
The ad is encouraging Australians not to be the only one with their lights left on, and shows the consequences of doing so that they may not have considered.
It's a completely different direction from the usual emotive and heart-wrenching advertising that environmental issues so often implement.
The simple copy of Switch Off is really nice too.