Guardian: Millions of people around the world are expected to switch off lights in homes, offices and famous landmarks at 8.30pm local time for an hour on Saturday to mark WWF's annual Earth Hour.
Now in its eighth year, the mass participation event to show support for environmental issues comes as the Intergovernmental Panel on Climate Change prepares to launch its latest report in Japan on Monday, outlining how global warming will affect wildlife, food supplies, water and the weather.
"It's fortuitous...