Earth Day is annually observed on April 22 to promote awareness about the environmental issues and urge people to embrace nature. This year marks the 51st anniversary of the celebration.

The day was founded in 1970 by Gaylord Nelson, a senator from Wisconsin. The theme this year is "Restore Our Earth," which will focus on natural processes, emerging green technologies and innovative thinking that can restore the world’s ecosystems.

Here are 10 environmental quotes taken from Earth 911 and Good Reads -

1. “In nature, nothing is perfect and everything is perfect. Trees can be contorted, bent in weird ways, and they're still beautiful.” — Alice Walker

2. “To see a world in a grain of sand, And a heaven in a wild flower, Hold infinity in the palm of your hand, And eternity in an hour.” — William Blake

3. “Look deep into nature, and then you will understand everything better.” — Albert Einstein

4. “The three great elemental sounds in nature are the sound of rain, the sound of wind in a primeval wood, and the sound of outer ocean on a beach.” — Henry Beston

5. “God wanted to make heaven and the earth is that heaven. Nowhere in the universe there is so much love, life, beauty and peace. Enjoy your stay with the fellow beings.” ― Amit Ray

6. “If we can give to urban people the peasant's love of nature and their deep understanding on the matter of nature's importance, the salvation of our Earth will be easier!” ― Mehmet Murat ildan

7. “Nature never did betray the heart that loved her.” — William Wordsworth

8. “In all things of nature there is something of the marvelous.” — Aristotle

9. “The poetry of the earth is never dead.” — John Keats

10. “Study nature, love nature, stay close to nature. It will never fail you.” — Frank Lloyd Wright

Earth climate change. Jürgen Jester/Pixabay