30 Inspiring Earth Day Trivia Questions and Answers

Earth Day trivia is a great way to learn about the history, people, and movements that shaped the world’s largest environmental celebration. From its beginnings in 1970 to today’s global events involving over a billion people, these questions highlight the key milestones, inspiring leaders, and actions that make Earth Day meaningful.

Whether it’s the first U.S. teach-ins, the signing of the Paris Agreement, or tree planting traditions across the globe, this trivia will test your knowledge and deepen your appreciation for a day dedicated to protecting our planet.

If you like this trivia, check out:

• Weather Trivia
• Arbor Day Trivia
• Nature Trivia
• Plant Trivia
• Flower Trivia
• Fun Facts about Earth

Earth Day Trivia

1. Who proposed the first Earth Day, and on what date was it first observed?

2. Approximately how many Americans participated in the first Earth Day?

3. What landmark U.S. agency was created later in response to the first Earth Day?

4. By 1990, Earth Day had become an international event. How many countries had joined?

5. What environmental book inspired much of the momentum behind the Earth Day movement?

6. Why was April 22 chosen for Earth Day in the U.S.?

7. What was the theme for Earth Day 2025?

8. How many people worldwide are expected to participate in Earth Day 2025?

9. Which country recognized Earth Day as “International Mother Earth Day”?

10. What annual U.S. environmental laws followed shortly after the first Earth Day?

11. Which student activist played a key role in coordinating the first Earth Day nationwide?

12. What organization now coordinates Earth Day globally?

13. When did the UK hold its first formal Earth Day observance?

14. What environmental campaign shares a theme with Earth Day by focusing on reducing resource overuse globally?

15. What ironic coincidence occurred between Earth Day and Earth Hour?

16. Which major U.S. environmental clean-up or recycling actions surged on Earth Day 1990?

17. What is the official Earth Day Network’s flagship campaign today?

18. Which year was Earth Day first celebrated digitally due to the COVID-19 pandemic?

19. What U.S. President planted a ceremonial tree on the White House lawn to honor the first Earth Day?

20. Which global climate agreement was signed on Earth Day in 2016?

21. Which year saw Earth Day recognized as International Mother Earth Day by the United Nations?

22. What iconic symbol of environmental awareness is closely tied to Earth Day?

23. Which U.S. city hosted the very first official Earth Day celebration?

24. What major climate protest coincided with Earth Day 1970?

25. Which group spearheaded the first international Earth Day in 1990?

26. What annual Earth Day activity in Japan involves planting cherry trees?

27. What common environmental action do most people perform on Earth Day?

28. Which major U.S. river was highlighted as heavily polluted around the first Earth Day?

29. What percentage of Americans recycle on Earth Day according to surveys?

30. Which American astronaut’s space missions helped inspire Earth Day by showing fragile Earth photos?

what’s next?

So, that wraps up our Earth Day Trivia! We regularly update this article with fresh facts about the environment and sustainability, so remember to bookmark this page so you don’t miss out on the latest updates.

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Hungry for more trivia? Then try our Holiday Trivia and Geography Trivia articles.