Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 pm local time, is meant as a show of support for tougher action to confront climate change.
Among the first landmarks around the world to dim their lights for the Earth Hour 2014 environmental campaign was Australia's Sydney Opera House and Harbour Bridge, which plunged into darkness on Saturday.
Lights went off in thousands of cities and towns across the world on Saturday for the annual Earth Hour campaign, aiming to raise money via Internet for local environmental projects.
A combination picture shows the India Gate before (bottom) and during the earth hour in New Delhi.
Millions around the world took part in Earth Hour on Saturday night, with more and more cities embracing the initiative this year. We bring you a presentation of pictures taken before and during the event, from all over the world.
The ministry further said the prime minister's appeal is to simply switch off the lights, and there is no call to switch off either street lights or appliances like computers, TVs, fans, refrigerators and ACs in homes.
We live in a wonderfully, weird world and here's the proof of it!
Power Minster R K Singh said, "The power supply ramp down and ramp up -- they (officials) handled very smoothly, and I along with my senior officials -- power secretary, POSCO CMD -- were personally monitoring the situation from National Monitoring Centre in the ministry. I congratulate all the engineers of NLDC, RLDC and SLDCs for handling the situation very efficiently especially in huge response to the Prime Minister's call".
From Earth Hour to LEED ratings for buildings, from carbon footprint to carbon credits, the world is climbing onto the 'green' bandwagon.
Even as the row over Amitabh Bachchan's presence at a Mumbai function refuses to die down, the megastar has claimed that his son Abhishek's posters were "apparently" removed from the venue of WWF's Earth Hour event in New Delhi attended by Chief Minister Sheila Dikshit.
Organised by WWF, this is a worldwide campaign in which nearly 1,500 cities, including Delhi and Mumbai, will switch off their lights on March 28 from 8.30 pm to 9.30 pm local time. The campaign is a symbolic event to send a strong message to our political leaders that we want them to take meaningful action on climate change.
The national per capita income in 2013-14 stood at Rs 87,748.
Here's a glimpse of all that happened around the world last month, in 20 images.
Ten images that show it's an odd, odd world we live in.
Realtors, consultants and foreign universities vie for big share.
External Affairs Minister Sushma Swaraj said on Tuesday clear that participation in the events was not 'compulsory'.
Some of the 19 NIT scholars who spent a week at the Rashtrapati Bhawan as part of an 'in-Residence Programme' share their learnings with Upasna Pandey
Gujarat has topped with a score of 71.14% on ease of doing business list.