Can Earth Hour Galvanize the Global Worming Fight?

• That hasn't stopped environmental groups from trying, however. On Saturday at 8:30 pm local time — beginning on Chatham Island in New Zealand, one of the first places on Earth that the dawn strikes — towns and cities in over 80 countries across the world will shut off their lights for 60 minutes, to draw attention to climate change. The National Stadium in Beijing, the Great Pyramids in Egypt, the Empire State Building in New York and even the Strip in Las Vegas — all will go dark for an hour to raise awareness of climate change and show that there is a worldwide constituency out there eager for action.

• This is the second year in a row that WWF has helped run a worldwide Earth Hour — the event began two years ago just in Australia) -- and participation has grown tremendously, from 400 cities in 2008 to some 4,000 this year. The image, at least, will be spectacular — monuments and skyscrapers switching off, a ring of darkness passing across the face of the planet.

• Earth Hour itself is easy to make fun of — skeptics will say that turning out the lights won't make but a light ding in our carbon emissions, and critics will claim it proves that environmentalists really do want to send us straight to the dark ages. The Competitive Enterprise Institute, a conservative think tank, is holding a counter-protest during the same time period called Celebrate Human Achievement Hour, which will "salute the people who keep the lights on and produce the energy that helps make human achievement possible."

• Global warming may never get its perfect picture — Earth Hour, a globe gone dark, may be the closest thing we'll have.