Earth Overshoot Day 2025 falls on July 24th

Press Release

What's the Problem, Really?

Exploring the underlying problem

The U.S. Can’t Afford to Silence Its Environmental Watchdogs

The Cost of Harassing Academic Institutions & NGOs

🎵 I love Paris… 🎵

Read about the benefits of leaving the Paris Agreement

Overshoot and National Security

Read More on the Biocapacity Blind Spot in National Security Strategies

Receiving the Nobel Sustainability Award

Read more about the Nobel Award Ceremony

Measure what you treasure

Humans use as much ecological resources as if we lived on 1.8 Earths. The Ecological Footprint is the only metric that compares the resource demand of individuals, governments, and businesses against Earth's capacity for biological regeneration.

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How can we make the need for resource security more obvious to diverse audiences? asks Mathis Wackernagel

Mathis Wackernagel, founder and president of Global Footprint Network Why did you write “Ecological Footprint: Managing Our Biocapacity Budget” now? Bill Rees and I wrote our first Ecological Footprint book in 1995 at a time when our resource-use estimates were still crude. The book summarized my Ph. D. dissertation, including a presentation of the basic... View Full Article

Ready for a Footprint Quiz? A playful quiz helps you brush up on your Footprint basics.