Global warming is a serious issue, and reduction of carbon emission is the main tool to reduce warm level in the earth. As the distributor of electrical energy, the Discoms must take the issue seriously, a Cesu release said. Cesu CEO Sushil Kumar Popli requested all the employees to observe the Earth Hour on March 19 by switching off all nonessential lights in offices and homes from 8.30 pm to 9.30 pm to pledge their support for saving mother earth. Observation of the Earth Hour has become a global event since 2008, having participation of 35 member countries.