A combination picture shows the Gateway of India monument after (top) and during Earth Hour in Mumbai March 29, 2014.
A combination picture shows the Gateway of India monument after (top) and during Earth Hour in Mumbai March 29, 2014.

Earth Hour 2014 was observed across the globe on 29 March 2014.

Millions of people worldwide switched of their lights during the Earth Hour, between 8.30 pm and 9.30 pm local time, as part of an annual global environmental campaign to raise awareness about energy use and conservation.

Earth Hour, organised by the World Wildlife Fund for Nature (WWF), originated in Australia in 2007, so as to create awareness about carbon pollution. Since then, several countries have taken part in the initiative and is observed every year on the last Saturday of March.

India joined the Earth Hour movement in 2009 when "5 million Indians across 56 cities showed their support by switching off non-essential lights and saving approximately 1,000 MW of power in one hour," according to the Earth Hour India's website.

In 2012, the movement witnessed the biggest ever public participation in India, where Hundred and fifty cities and 10,00,000 students volunteered to take part in the event.

Last year, New Delhi was announced as India's Earth Hour National Capital 2013 in the Earth Hour City Challenge. As part of the initiative, dance performances, candlelit marches, musical evenings and signature campaigns were organised to promote renewable energy.

This year too, Earth Hour was observed across various cities in India. Lights of illuminated monuments such as Gateway of India, Mumbai, India Gate in New Delhi, the Howrah Bridge in Kolkata, the Chhatrapathi Shivaji Terminus railway station in Mumbai and the presidential palace Rashtrapati Bhavan in New Delhi plunged into darkness during the Earth Hour.

Hotels and corporate houses also took part in the movement by switching off the lights. The WWF had also organised a concert "Jam for the Hour" that had performances by bands like Faridkot at Dilli Haat.

A combination picture shows the India Gate before (bottom) and during Earth Hour in New Delhi March 29, 2014.
A combination picture shows the India Gate before (bottom) and during Earth Hour in New Delhi March 29, 2014.
A combination picture shows India's presidential palace Rashtrapati Bhavan before (bottom) and during Earth Hour in New Delhi March 29, 2014.
A combination picture shows India's presidential palace Rashtrapati Bhavan before (bottom) and during Earth Hour in New Delhi March 29, 2014.
A combination picture shows the Howrah Bridge before (bottom) and during Earth Hour in Kolkata March 29, 2014.
A combination picture shows the Howrah Bridge before (bottom) and during Earth Hour in Kolkata March 29, 2014.
A combination picture shows the Chhatrapati Shivaji terminus railway station, also known as Victoria terminus, before (top) and during Earth Hour in Mumbai March 29, 2014.
A combination picture shows the Chhatrapati Shivaji terminus railway station, also known as Victoria terminus, before (top) and during Earth Hour in Mumbai March 29, 2014.