Updated On: 25 March, 2021 08:32 AM IST | Mumbai | Anindita Paul
At 8.30 pm on the last Saturday of March, millions of homes around the world go dark to commemorate Earth Hour. Here’s why this matters

Earth Hour is celebrated across 180 countries. Pic/Instagram
The first Earth Hour was observed in Sydney in 2007 with a symbolic lights-out event. Since then, it has evolved into one of the world’s largest grassroots movements for environmental conservation, uniting people in more than 180 countries and territories.
The event addresses the ongoing climate crisis. Representation Pic