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How Much Do You Really Know About Earth Day?
Every year on April 22nd, Earth Day brings together people from around the globe to raise awareness about environmental issues, celebrate the beauty of our planet, and inspire action toward sustainability. But how much do you actually know about Earth Day’s history, traditions, and the planet it celebrates?
Whether you’re a student, teacher, eco-activist, or just curious about the world, this Earth Day trivia collection is a great way to test your knowledge—and maybe even learn a few surprising facts along the way. Grab a pen, challenge your friends, or quiz your class with these 50 Earth Day trivia questions and answers!
1. In what year was the first Earth Day celebrated?
2. Who is credited with founding Earth Day?
3. What date is Earth Day celebrated each year?
4. How many people participated in the first Earth Day?
5. Which country was the first to officially observe Earth Day?
6. What major U.S. environmental agency was formed shortly after the first Earth Day?
7. What decade saw the rise of major environmental laws like the Clean Air Act and Clean Water Act?
8. What is the theme of Earth Day 2025?
9. What famous environmental disaster helped inspire Earth Day?
10. What is the most common symbol associated with Earth Day?
11. Which element is the most abundant in Earth’s atmosphere?
12. What percentage of the Earth’s surface is covered by water?
13. What is the term for a species that is no longer found anywhere on Earth?
14. What renewable energy source comes from the sun?
15. Which greenhouse gas is produced by burning fossil fuels and is a major contributor to climate change?
16. What does “biodegradable” mean?
17. What is composting?
18. Which type of bag is better for the environment: paper, plastic, or reusable?
19. What is the term for planting trees to restore forests?
20. What global environmental conference led to the creation of the Kyoto Protocol?
21. What endangered animal is the symbol of the World Wildlife Fund (WWF)?
22. What country has the most forest area in the world?
23. What ocean is the largest on Earth?
24. What does “EPA” stand for?
25. What type of pollution is caused by excessive artificial light?
26. What is the process called when harmful chemicals are released into bodies of water?
27. What energy source comes from wind movement?
28. What environmental day is celebrated on March 22 each year?
29. What is the term for farming without synthetic chemicals or pesticides?
30. Which country produces the most solar power as of recent global reports?
31. What is the average time it takes a plastic bottle to decompose?
32. What kind of energy is generated from the Earth’s heat?
33. What invention helps reduce energy consumption in homes?
34. What international agreement aims to combat climate change by limiting global warming?
35. What household item uses the most water?
36. Which continent produces the least amount of carbon emissions?
37. What is the main goal of Earth Hour, held annually in March?
38. What is the layer of gases that protects the Earth from the sun’s harmful rays?
39. What material is most commonly recycled?
40. What natural disaster can result from deforestation and soil erosion?
41. What is the scientific term for species diversity in an ecosystem?
42. What is an “ecological footprint”?
43. What type of engine produces less pollution: electric or gasoline?
44. What does “net zero” mean in environmental terms?
45. What color bin is commonly used for recycling paper and cardboard?
46. What plant is known for absorbing large amounts of carbon dioxide?
47. What type of habitat is being lost at the fastest rate worldwide?
48. What is “upcycling”?
49. What is one of the biggest contributors to ocean pollution?
50. What does “sustainability” mean?
How Green Is Your Knowledge?
Earth Day is not only about action—it’s also about awareness. These trivia questions remind us of the challenges our planet faces and the importance of environmental literacy. Whether you aced this quiz or discovered something new, keep learning, growing, and protecting our one and only Earth. Because knowledge is power—and the Earth deserves nothing less.
