When is Earth Day celebrated every year?

What is the main purpose of Earth Day?

In which year was the first Earth Day celebrated?

What gas do trees absorb to help fight climate change?

What do we call the variety of life on Earth?

Who is known as the founder of Earth Day?

What color is often used on Earth Day?

What should we do with old paper?

How long does it take a plastic bottle to decompose?

What does “eco-friendly” mean?