Earth hour - Sydney Opera House
The Sydney Opera House goes green for Earth Hour! Image from WWF Australia.(official Facebook Site of Earth Hour)

Earth Hour 2015 will be observed on Saturday, 28 March, from 8.30 pm to 9.30 pm worldwide. People across the world will observe the occasion by turning off lights, navigating by star and candlelight, to raise awareness about climate change.

UN Secretary General Ban Ki-Moon, describing Earth Hour's importance, said, "Earth Hour is a way for the citizens of the world to send a clear message that they want action on climate change."

This year, 170 countries including 1,200 landmarks and close to 40 UNESCO world heritage sites will be turning lights off for an hour to participate in the movement. 

The Earth Hour is a worldwide movement. But just to encourage you and highlight the importance of the occasion, we have compiled a list of quotes.

Quotes for Earth Hour 2015:

1. If we do not permit the earth to produce beauty and joy, it will in the end not produce food, either. Joseph Wood Krutch

2. The proper use of science is not to conquer nature but to live in it. Native American Proverb

3.  He that plants trees loves others beside himself. David Letterman

4. The use of solar energy has not been opened up because the oil industry does not own the sun. Thomas Fuller

5. There is a great need for the introduction of new values in our society, where bigger is not necessarily better, where slower can be faster, and where less can be more. Ralph Nader

6. Never doubt that a small group of thoughtfully committed citizens can change the world. Indeed, it's the only thing that ever has. Gaylord Nelson

7. For 200 years we've been conquering nature. Now we're beating it to death. Margaret Mead

8. What is the use of a house if you haven't got a tolerable planet to put it on? Groucho Marx

9. Suburbia is where the developer bulldozes out the trees, then names the streets after them.Henry David Thoreau

10. The wealth of the nation is its air, water, soil, forests, minerals, rivers, lakes, oceans, scenic beauty, wildlife habitats and biodiversity... that's all there is. That's the whole economy. That's where all the economic activity and jobs come from. These biological systems are the sustaining wealth of the world. Bill Vaughan

11. The earth is what we all have in common. Thomas Alva Edison

12. When one tugs at a single thing in nature, he finds it attached to the rest of the world. Frank Lloyd Wright