TEHRAN – Tonight, millions of people across the globe unite to show that they care about the future of our planet, by switching off for one hour.

Earth Hour is a worldwide movement organized by the World Wildlife Fund (WWF).

The event is held annually, encouraging individuals, communities, and businesses to turn off non-essential electric lights, for one hour, from 8:30 to 9:30 p.m. on the last Saturday of March, as a symbol of commitment to the planet. It started as a lights-off event in Sydney, Australia, in 2007.

Iran joined this world event in 2011 by turning off the lights of the Milad tower in the capital, Tehran.

In the following years, more Iranian cities joined this movement by turning off the famous structures, and in addition to the Milad Tower, Azadi Tower in Tehran, Isfahan's Sio-Se Pol Bridge, and Ahvaz's White Bridge, also turned off their lights.

Later on, the symbolic move was accompanied by the participation of more cities in the country, including Tabriz, Rasht, and Qom.

In Tabriz, the lighting system of the municipal palace of the city was turned off for an hour.

According to estimates, if 30 million electricity subscribers in Iran, each turn off just one 100-watt light bulb, it will save three thousand megawatts of electricity.

As in previous years, Iranian households, businesses, and tourist places remind us to protect the environment by turning off lights and other unnecessary electrical devices.

The purpose of this action is to raise awareness about climate change and the fact that the need for careful consumption of energy should be promoted in the world.