Today at 20:30h WWF’s Earth Hour calls on individuals, communities, and businesses in over 190 countries and territories to switch off their lights and give an hour for earth, spending 60 minutes doing something positive for the planet. WWF and partners have committed to turning a single Earth Hour into thousands and millions of hours of action and awareness through the world’s largest grassroots environmental campaign, shining an unmissable global spotlight on the twin perils of nature loss and climate change.