On July 24, 2025, humanity used up the ecological resources that Earth can regenerate in a full year. That date, tracked annually by the Global Footprint Network and called Earth Overshoot Day, sits at the center of how Colcom Foundation describes the planet’s current condition.

The foundation reads the date as evidence that people now consume the equivalent of about 1.7 Earths every year. Whatever is used beyond the planet’s annual regeneration comes out of natural capital, the stock of forests, fisheries, soils, and freshwater that ecosystems cannot quickly replace.

Carrying Capacity Explained

Colcom Foundation defines carrying capacity as “the maximum population size that can be sustained by a specific environment, given the food, habitat, water, and other resources available.” The concept comes from ecology, where it is routinely applied to animal populations. Colcom Foundation applies the same reasoning to people. Carrying capacity matters, the foundation says, because growth that ignores ecological limits degrades the natural systems on which all life, including human civilization, depends.

According to the group, a human population that pushes past this limit spends down its natural capital. Ecosystems become unstable, and if the pattern continues, conditions can develop for catastrophic collapse. Colcom Foundation affirms that current scientific data indicate humanity has already crossed that threshold globally.

What Lies Beyond the Limit

The foundation ties overshoot to a list of long-term consequences it draws from peer-reviewed literature: accelerating extinction of non-human species, habitat destruction, freshwater depletion, and worsening climate impacts. It cites Bradshaw et al. (2021) in Frontiers in Conservation Science, which concluded that excessive human numbers and overconsumption are driving a sixth mass extinction.

The organization’s proposed answer pairs lower per capita consumption with population stabilization. Where fertility is high, it favors voluntary family planning and education for women. For the United States, where fertility has stayed at or below replacement since 1972, it advocates immigration levels that would bring net population growth to zero. These two levers, it argues, work best together. See related link for additional information.

Learn more about Colcom Foundation on https://www.causeiq.com/organizations/colcom-foundation,311479839/