The World Wide Fund for Nature (WWF) held the annual global event ‘Earth Hour’ on 25 March 2017 from 8:30 p.m. to 9:30 p.m. The campaign aims to spread awareness about climate change. It deliberately promotes an energy-efficiency solution, responsible consumption, and sustainable cities. PolyU has been supporting this meaningful event for 11 years since 2007 by switching off most non-essential lighting and TV displays during that period.
More about the Earth Hour campaign can be read from the website https://earthhour.wwf.org.hk/