The Earth Hour event first took place in Sydney in 2007 with some two million people switching off their lights. Earth Hour 2017 will take place on Saturday 25 March at 8:30pm local time, when millions of people in over 170 countries across the world will switch off their lights for one hour to show that they care about the future of our planet.

Ulaanbaatar citizens will switch off their lights as part of the Worldwide Fund for Nature"s (WWF) Earth Hour.

Earth Hour is not about how much energy is saved during the hour, but about putting the spotlight on the issues facing the planet and inspiring people to live more sustainably. The idea is that the choices people make and the actions they take after the hour is up can help reduce the impacts of climate change on the planet, its wildlife and future generations.