The first Earth Day was celebrated on April 22nd 1970 to increase ecological awareness and unify the grassroots environmental movement in the United States. Today, Earth Day is celebrated by 1+ billion people globally, making it the largest secular observance in the world. Many important milestones have happened on Earth Day since 1970, such as the signing of the Paris Agreement, the introduction of electric vehicles, hundreds of countries committing to net zero targets, and more. Let’s look back at the first 50 years of Earth Day and the important actions it has helped inspire, including:

• Environmental changes
• Technology innovations
• Regulatory progress