Brandenburg Gate goes dark for Earth Hour campaign The Brandenburg Gate in Berlin is swallowed up into darkness as its lights are turned off as part of a global campaign to raise awareness about climate change and its impact on the planet's vanishing plant and animal life. The 13th edition of Earth Hour, organised by green group WWF, saw millions of people across 180 countries turn off their lights at 8:30 pm to highlight energy use and the need for conservation. IMAGES