In more silver-lining news related to COVID-19, humanity’s ecological footprint contracted this year more than any time since researchers started tracking it in the 1970s. Earth Overshoot Day will fall three weeks later this year than it did in 2019.

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If you’re unfamiliar with the concept, Earth Overshoot Day isn’t exactly a holiday. The date changes year to year and marks the time when humans’ use of ecological resources and services exceeds what our planet can regenerate in a year. This year, Earth Overshoot Day will fall on August 22, according to the Global Footprint Network. Last year, the grim day came three weeks earlier, on July 29. While this is a significant improvement, it still falls noticeably short, with humanity using a year’s worth of resources with more than four months of the year still to go.

Related: Every year, humanity ‘overshoots’ the natural resources earth can replenish

The Global Footprint Network calculates Earth Overshoot Day by dividing Earth’s biocapacity, or the amount of natural resources the planet can generate that year, by people’s demand for those resources. Then it multiplies the ratio by 365.

We have COVID-19 to thank for this year’s 9.3% reduction of our ecological footprint. When you put humans on lockdown, carbon dioxide emissions suddenly drop. “This shift in the year-to-year date of Earth Overshoot Day represents the greatest ever single-year shift since the beginning of global overshoot in the early 1970s,” according to  the Earth Overshoot Calculation Report 2020. “In several instances the date was pushed back temporarily, such as in the aftermath of the post-2008 Great Recession, but the general trend remains that of a consistent upward trajectory.”

Humanity is currently burning through natural resources 1.6 times faster than Earth can regenerate. So unless we can find an extra .6 planet, we will either have to change our ways ASAP or run short of resources. The Global Footprint Network’s ambitious goal is to move Earth Overshoot Day back five days per year, so that by 2050, we will be living within our ecological means. The group’s website suggests ways that people can move the date by focusing on five areas: cities, food, population, energy and planet.

+ Earth Overshoot Day

Images via Earth Overshoot Day and Arek Socha