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"Trees directly underpin the survival of a staggering array of species—including us," said one scientist.
More than one-third of Earth's tree species are at risk of extinction, with logging, forest destruction for agriculture and urban development, and human-caused global heating most responsible for this "frightening" development that threatens life as we know it, according to a report published Monday.
The 2024 Global Tree Assessment—released at the United Nations Biodiversity Conference (COP16) in Cali, Colombia and published as part of this year's International Union for Conservation of Nature (IUCN) "Red List" of threatened species—warns that more than 16,000 of the 47,000 tree species analyzed in the report are at risk of extinction.
The report blames deforestation and catastrophic global heating, caused by human burning of fossil fuels, as the main drivers of tree extinction. More than 5,000 tree species on the IUCN Red List are felled for construction timber, while 2,000 species are used for fuel, food, and medicines.
According to the report:
Trees now account for over one-quarter of species on the IUCN Red List, and the number of threatened trees is more than double the number of all threatened birds, mammals, reptiles, and amphibians combined. Tree species are at risk of extinction in 192 countries around the world...
The highest proportion of threatened trees is found on islands. Island trees are at particularly high risk due to deforestation for urban development and agriculture at all scales, as well as invasive species, pests, and diseases. Climate change is increasingly threatening trees, especially in the tropics, through sea-level rise and stronger, more frequent storms.
"Trees are essential to support life on Earth through their vital role in ecosystems, and millions of people depend upon them for their lives and livelihoods," IUCN director-general Grethel Aguilar said in a statement. "As the IUCN Red List celebrates 60 years of impact, this assessment highlights its importance as a barometer of life, but also, crucially, as a unique tool guiding action to reverse the decline of nature."
Climate, environmental, and biodiversity defenders pointed to the new report with alarm.
"The significance of the Global Tree Assessment cannot be overstated, given the importance of trees to ecosystems and people," said Eimear Nic Lughadha, senior research leader in conservation assessment and analysis at the U.K. Royal Botanic Gardens, Kew. "We hope this frightening statistic of 1 in 3 trees facing extinction will incentivize urgent action and be used to inform conservation plans."
Fran Price, the Worldwide Fund for Nature's forest practice lead, said in a statement that "IUCN's Global Tree Assessment paints a shocking picture of the state of the world's trees."
"Trees are invaluable allies in tackling climate change and a critical foundation of our natural world," Price added. "The report is an eye-opening reminder that current efforts are falling short in safeguarding these vital natural assets. It's time to take stronger action against illegal logging and trade and enact stronger laws that protect our trees."
David Hole, an IUCN-U.S. board member and Conservation International scientist, asserted that "trees directly underpin the survival of a staggering array of species—including us."
"This latest IUCN update is flashing a warning light that those green giants need more of our attention and support the world over," he continued. "Thriving, naturally diverse forests are essential in mitigating both climate change and biodiversity loss. Not only do they store more carbon, they are also more resilient to natural and human-driven threats."
"We know what we have to do," Hole added. "We need to provide real and effective protection for tree species across the globe—particularly those that are imminently threatened. And we must do that in ways that support local people and communities, and doesn't cut them off from what is often a critical resource."
There is hope: Besides cutting carbon emissions and combating deforestation, Hole pointed to the "enormous untapped potential" of restoring native trees in previously degraded agricultural lands.
"Not only could we store more carbon, we could also enhance food security, support biodiversity, and increase agricultural systems' resilience to the myriad pressures that climate change is increasingly placing them under," he said. "These are the types of innovative approaches that can make a big positive difference—and it is vital we start implementing them at scale."
"The Forest Service should listen to the public and finalize policies that truly safeguard our oldest forests," a coalition of environmental organizations advised.
Green groups on Friday pointed to the more than 1 million public comments urging the U.S. Forest Service to protect old-growth forests from logging in urging the Biden administration to increase what critics say are inadequate protections for mature trees in a proposed federal amendment.
The Forest Service (USFS)—a branch of the U.S. Department of Agriculture—received massive input during four rounds of public comment on the National Old-Growth Amendment Draft Environmental Impact Statement.
The USFS' proposed national old-growth amendment follows a 2022 executive order by President Joe Biden that directed the agency to draft policies to protect mature trees in national forests, which are imperiled by but also play a critical role in fighting fossil fuel-driven climate change.
"The national old-growth amendment should be a transformative policy that positions the United States as an international leader in harnessing nature to confront the climate emergency and the biodiversity crisis."
Climate campaigners panned Biden's order as "grossly inadequate." Since the executive order, the Biden administration has allocated $50 million for old-growth forest conservation under the Inflation Reduction Act, which the president signed in August 2022.
In June, USFS announced a draft environmental impact statement for a proposed amendment to Biden's directive. Environmentalists called the draft a "step forward" while urging the administration to do more to protect mature forests.
"Since 2022, hundreds of thousands of people have called for an end to logging old-growth and urged that our mature forests also be protected. The Forest Service should listen to the public and finalize policies that truly safeguard our oldest forests," a coalition of green groups including the Center for Biological Diversity (CBD), Earthjustice, Environment America Research and Policy Center, National Resources Defense Council, Sierra Club, and WildEarth Guardians said in a joint statement.
"As the Forest Service reads the comments it has received over the last 90 days, it will find a common theme. The old-growth policy proposed in June fails to meet the central mission of the executive order—it does not protect old-growth trees from logging and allows projects that would log old-growth forests out of existence through numerous loopholes. The policy also does nothing to protect mature forests, which are needed to increase the abundance and distribution of old-growth trees and forests."
As CBD explained:
Mature and old-growth forests are carbon storage powerhouses. With thicker protective bark and higher canopies than younger trees, mature and old-growth trees are more resilient to wildfire. They also provide critical wildlife habitat, filter clean drinking water for communities, provide countless outdoor recreation opportunities, and capture the imaginations of Americans young and old.
Federal forest management prioritizes timber production and routinely sidesteps science to turn big, old trees into lumber and wood chips. Logging releases a significant amount of stored carbon, which can take centuries to be recaptured. It also eliminates older trees' ability to sequester additional carbon and damages the other ecosystem services and biodiversity values these forests provide. Many older stands and trees have no enduring protection, and hundreds of thousands of acres in national forests are at risk of being logged.
"The national old-growth amendment should be a transformative policy that positions the United States as an international leader in harnessing nature to confront the climate emergency and the biodiversity crisis," the groups' statement asserted. "We hope to see the nationwide old-growth amendment strengthened so it can become a centerpiece of our nation's climate and conservation legacies."
In a separate statement, Environment America public lands campaign director Ellen Montgomery said that "the Forest Service should listen to the more than a million people who have commented over the last two years, urging it to end logging of old-growth trees."
"The response from the public to our on-the-ground efforts to build support for a strong national old-growth amendment has shown that people want to see older trees protected," she continued. "These trees and forests are home to wildlife that we love from birds to bears. They are our allies to fight back against climate change, and all we have to do is make sure they stay upright."
"We hope the Forest Service recognizes the truth that the public knows: old-growth trees are worth more standing," Montgomery added.
"This is a humanitarian disaster in the making—it's absolutely vital that the loggers are thrown out, and the Mashco-Piro's territory is properly protected at last," said the director of Survival International.
A leading rights group on Tuesday called for loggers to be "thrown out" of a remote part of the Peruvian Amazon following recent sightings of people belonging to what is believed to be the world's largest uncontacted Indigenous tribe.
London-based Survival International published video and photos of dozens of Mashco-Piro people taken near the village of Monte Salvado in southeastern Peru near the Brazilian border. The group said that in recent days, more than 50 Mashco-Piro have appeared near the village, which is inhabited by the related Yine people. A group of 17 Mashco-Piro were also recently sighted near the neighboring village of Puerto Nuevo.
Several logging companies are operating within just a few miles of where the Mascho-Piro were spotted. One company operating inside Mashco-Piro territory, Canalaes Tahuamanu, has laid more than 120 miles of road there to facilitate timber extraction. The company is certified by the Forest Stewardship Council as a sustainable and ethical operator, even though it is known to be felling trees inside Mashco-Piro territory. Survival International is calling on the FSC to withdraw its certification.
"This is a humanitarian disaster in the making—it's absolutely vital that the loggers are thrown out, and the Mashco-Piro's territory is properly protected at last," Survival International director Caroline Pearce said in a statement Tuesday. "The FSC must cancel its certification of Canales Tahuamanu immediately—failure to do so will make a mockery of the entire certification system."
Alfredo Vargas Pio, president of the local Indigenous group Native Federation of the Río Madre and its Tributaries, called the new photographs "irrefutable evidence that many Mashco-Piro live in this area, which the government has not only failed to protect, but sold off to logging companies."
"The logging workers could bring in new diseases which would wipe out the Mashco-Piro, and there's also a risk of violence on either side," he added, "so it's very important that the territorial rights of the Mashco-Piro are recognized and protected in law."
In 2014, Peruvian authorities evacuated residents from Monte Salvado by boat after around 200 Mashco-Piro armed with bows and arrows raided the village, killing livestock and pets and taking food and tools. In 2022, Mashco-Piro members killed 21-year-old Peruvian logger Gean del Aguila and wounded another man with arrows as they fished on the Tahuamanu River.
In the 1890s most Mashco-Piro were either enslaved or exterminated by private mercenaries hired by self-described Peruvian "Rubber King" Carlos Fitzcarrald—immortalized in the 1982 Werner Herzog film Fitzcarraldo. Surviving Mashco-Piro fled deeper into the Amazon and avoided contact with most outsiders. They fiercely defended their territory from intruders. However, in recent decades, loggers have penetrated and exploited Mascho-Piro lands.
There are believed to be more than 750 Mascho-Piro living in Peru. They sometimes cross the border into Brazil.
"They flee from loggers on the Peruvian side. At this time of the year they appear on the beaches to take tracajá eggs," Rosa Padilha of the Indigenous Missionary Council in the Brazilian state of Acre toldThe Guardian, referring to a species of Amazon turtle.
"That's when we find their footprints on the sand. They leave behind a lot of turtle shells," Padilha added. "They are a people with no peace, restless, because they are always on the run."
Around 15 other uncontacted Indigenous tribes with as many as 15,000 members are believed to remain in the Peruvian Amazon. It is illegal to make contact with such peoples for fear they would contract common human illnesses that could be fatal to unexposed populations without immunity.