By Radhika Tiwari
New Delhi, Mar 29 (UNI) The world will again, for the 12th time, turn off lights to switch to a greener, much brighter future as more than 7,000 cities across 187 countries will observe Earth Hour-2019 on Saturday, March 30, from 2030 to 2130 hours.
The theme for this year is ‘Change the Way We Live!’.