Skip to main content

Sign up for our newsletter.

Quality journalism. Progressive values. Direct to your inbox.

Please Support Common Dreams This #GivingTuesday

Our coverage of the climate emergency, Covid-19, and rising authoritarianism have intensified over the last two years. But our expenses during the pandemic have gone up as well. This has been one of the toughest years we’ve ever faced. Though our content is free to all, less than 1% of our readers ever make a donation. We're counting on you. Please support independent media today.

Please Help This #GivingTuesday -- Though our content is free to all, less than 1% of our readers give. We’re counting on you. Please help Common Dreams end the year strong.

A traffic jam is seen on the freeway in San Francisco. (Photo: Rolf Schulten/ullstein bild via Getty Images)

The Anthropocene Is... Heavy: Scientists Find Human-Made Objects Now Outweigh All Life on Earth

"The science-fiction scenario of an engineered planet is already here." 

Julia Conley

As human consumption and pollution have led to a reduction in the Earth's biodiversity, those same activities have helped to create so many human-made objects that the weight of such materials is expected to exceed that of all people, other living animals, and plants by the end of 2020. 

Scientists at the Weizmann Institute of Sciences in Rehovot, Israel, published (pdf) a study in Nature on Wednesday showing that the weight of all human-made objects, or "anthropogenic mass"—including automobiles, buildings, roads, and smaller plastics and other materials—is estimated at one teratonne, or one trillion metric tons.

"We find that Earth is exactly at the crossover point; in the year 2020, the anthropogenic mass, which has recently doubled roughly every 20 years, will surpass all global living biomass," wrote the scientists in Nature. "On average, for each person on the globe, anthropogenic mass equal to more than his or her body weight is produced every week."

While the weight of human-made objects has doubled every two decades recently, that of living animals and plants has dropped; the United Nations warned in a report last year that about one million species are now threatened with extinction as humans have encroached on natural habitats for agricultural and development purposes, exploited wild animals, and driven the climate crisis through fossil fuel extraction. 

The significance of the new study regarding the weight of anthropogenic mass "is symbolic in the sense that it tells us something about the major role that humanity now plays in shaping the world and the state of the Earth around us," Dr. Ron Milo, who led the research, told BBC News.

The new research, wrote Jan Zalasiewicz and Mark Williams, professors of palaeobiology at the University of Leicester in the U.K., upends the long-held idea of "a natural world that dwarfed humanity and its creations":

Our constructions have now—indeed, spookily, just this year—attained the same mass as that of all living organisms on Earth. The human enterprise is growing fast, too, while nature keeps shrinking. The science-fiction scenario of an engineered planet is already here.

[...]

Since the mid-20th century, the Earth has been set on a new, human-driven trajectory... The weight of evidence, here, seems unarguable.

The scientists behind the study found that in 1900, human-made objects weighed roughly 35 billion tonnes, and that the weight doubled by the middle of the 20th century.

Since the Great Acceleration after World War II, "our stuff increased several-fold to a little over half a trillion tonnes by the end of the century," wrote Zalasiewicz and Williams at The Conversation. "In coming years, the living world will be far outweighed—threefold by 2040, they say, if current trends hold."

The scientists wrote in their study that their "quantification of the human enterprise" provides new evidence that the planet has entered "the human-induced epoch of the Anthropocene"—a geological age in which humanity's impacts on the living world will be visible in sediments millions of years from now.


Our work is licensed under Creative Commons (CC BY-NC-ND 3.0). Feel free to republish and share widely.

... We've had enough. The 1% own and operate the corporate media. They are doing everything they can to defend the status quo, squash dissent and protect the wealthy and the powerful. The Common Dreams media model is different. We cover the news that matters to the 99%. Our mission? To inform. To inspire. To ignite change for the common good. How? Nonprofit. Independent. Reader-supported. Free to read. Free to republish. Free to share. With no advertising. No paywalls. No selling of your data. Thousands of small donations fund our newsroom and allow us to continue publishing. Can you chip in? We can't do it without you. Thank you.

New Research Finds Climate Emergency the 'Overwhelming Factor' Behind Australian Bushfires

"It is now clear that human-induced climate change is creating ever more dangerous conditions for fires in Australia."

Andrea Germanos ·


Socialist Candidate Takes Commanding Lead in Honduran Election

Xiomara Castro, wife of Manuel Zelaya, a leftist former president ousted in a U.S.-backed coup in 2009, is on track to defeat the candidate of the right-wing incumbent party.

Kenny Stancil ·


WHO Chief Urges Pandemic Treaty to Avoid Another 'Crisis of Sharing and Solidarity'

"It will all happen again unless you, the nations of the world, can come together to say with one voice: never again."

Julia Conley ·


Iran Says US Must Lift 'Tyrannical and Illegal' Sanctions to Return to Nuclear Deal

"The Islamic Republic of Iran has entered the talks with a strong will and elaborate preparations in order to ensure the removal of unlawful and cruel sanctions."

Jake Johnson ·


2.5 Million Nurses Demand UN Probe Into 'Covid-19 Criminals' Blocking Patent Waiver

The European Union, the United Kingdom, Switzerland, Norway, and Singapore "must be investigated for blocking a faster global vaccine rollout leading to the loss of countless lives."

Jake Johnson ·

Support our work.

We are independent, non-profit, advertising-free and 100% reader supported.

Subscribe to our newsletter.

Quality journalism. Progressive values.
Direct to your inbox.

Subscribe to our Newsletter.


Common Dreams, Inc. Founded 1997. Registered 501(c3) Non-Profit | Privacy Policy
Common Dreams Logo