For an hour on March 31, residents in the capital are being urged to switch off their lights and unplug unnecessary electric appliances to celebrate the spirit of conservation and global sustainability. The initiative, which will take place between 8.30pm and 9.30pm, is part of the Earth Hour commemoration in the capital. \"Collective participation in this symbolic initiative of Earth Hour stresses the importance of conserving the environment and saving energy. It also raises awareness about climate change, and what can be done to tackle it using shared efforts,\" said Khalifa Al Mazroui, general manager at the municipality. According to a statement sent yesterday by the municipality, March 31 will also see a range of activities along the Corniche and across malls in the capital.