Earth Day Trivia 2026: Test Your Environmental Knowledge

Earth Day 2026 falls on Wednesday, April 22 — marking 56 years since the first celebration in 1970. What started as a grassroots teach-in has become the world's largest environmental movement, with over a billion participants across 193 countries.

But how much do you actually know about the planet, its challenges, and the history of the movement to protect it?

Take the Earth Day Trivia Quiz →

The History of Earth Day

The first Earth Day was organized by Senator Gaylord Nelson of Wisconsin after witnessing the devastating 1969 Santa Barbara oil spill. He recruited activist Denis Hayes to organize campus teach-ins, and on April 22, 1970, an estimated 20 million Americans — 10% of the US population at the time — took to the streets.

The impact was immediate. By the end of 1970, Congress had created the Environmental Protection Agency (EPA) and strengthened the Clean Air Act. The Clean Water Act followed in 1972, and the Endangered Species Act in 1973.

Key Environmental Facts for 2026

71% of Earth's surface is covered by water — and only about 3% of it is fresh water

Over 44,000 species are currently threatened with extinction according to the IUCN Red List

Hydropower remains the world's largest source of renewable electricity, though solar and wind are closing fast

450+ years — that's how long a plastic bottle takes to decompose in a landfill

China is the largest annual CO2 emitter, followed by the US and India

The Great Pacific Garbage Patch covers an area roughly twice the size of Texas

What You Can Do on Earth Day 2026

Take the quiz — test your knowledge and share with friends

Reduce single-use plastics — bring reusable bags, bottles, and containers

Join a local cleanup — beaches, parks, and rivers need volunteers

Plant something — a tree, a garden, or even a windowsill herb

Learn one new thing — understanding the problem is the first step to solving it

FAQ

When is Earth Day 2026?

Earth Day 2026 is on Wednesday, April 22. It has been celebrated every April 22 since 1970.

Who started Earth Day?

Senator Gaylord Nelson of Wisconsin organized the first Earth Day in 1970 as an environmental teach-in. Denis Hayes coordinated the event nationally, and 20 million Americans participated.

How many countries celebrate Earth Day?

Earth Day is now observed in 193 countries, making it the world's largest secular observance.

More Quizzes to Try

What Type of Environmentalist Are You? — Personality quiz for Earth Day

How Sustainable Are You? — Rate your eco-habits

Space and Planets Trivia — Test your knowledge of the cosmos