
Our planet has not passed its latest health check-up. A new assessment of Earth’s life-support systems shows that six out of nine of these crucial processes have crossed their “planetary boundary.” These boundaries are not tipping points—it’s possible to recover from passing them—but they are thresholds signifying we’ve entered higher-risk territory.
On another worrying note, scientists found the planet is close to breaching a seventh planetary boundary: ocean acidification.
In its first edition, a report from the Potsdam Institute for Climate Impact Research (PIK) used years of data and assessments to evaluate the nine planetary boundaries. These life-support systems make Earth resilient and stable. Alarmingly, six of those boundaries have already been crossed, as a similar assessment last year also concluded. The new report adds to that finding, suggesting these six metrics are now moving further into the “red zone,” or what the researchers consider a high-risk zone.
“The overall diagnostic is that the patient, Planet Earth, is in critical condition,” says Johan Rockström, PIK director and pioneer of the Planetary Boundaries Framework, in a statement.
Boundaries that have already been exceeded have to do with climate change, freshwater availability, biodiversity, land use, nutrient pollution (such as phosphorus and nitrogen) and the introduction of synthetic chemicals and plastics to the environment.
Ocean acidification is one of the systems that has not yet crossed its planetary boundary, along with ozone depletion and aerosols in the atmosphere. But while ocean acidification is still in the “green zone,” the new report finds it’s trending in the wrong direction. Scientists now say this metric is on the brink and may cross out of the safe zone in the next few years.
Earth’s oceans absorb carbon dioxide from the atmosphere, providing a valuable carbon sink as humans burn fossil fuels. But this process also makes the oceans more acidic, which can disturb the formation of shells and coral skeletons and affect fish life cycles, per the report.

As ocean acidification approaches the boundary, scientists are particularly concerned about certain regions, like the Arctic and Southern oceans. These areas are vital for carbon and global nutrient cycles, “which support marine productivity, biodiversity and global fisheries,” the report says.
“Looking at the current evolution, I’d say it’s really, really difficult to prevent that [boundary] crossing,” says Levke Caesar, a climate physicist at PIK and an author of the report, to Mongabay’s Sean Mowbray.
Other recent studies indicate the current conditions are already affecting some marine organisms, Caesar said in a press briefing, per the Guardian’s Damien Gayle. As a result, it might be necessary to re-evaluate “which levels can actually be called safe,” she added.
Levels of acidification are different across the world’s oceans. Colder waters, like those in the polar regions, may become more acidic more quickly, because they absorb more carbon dioxide. For some scientists, this suggests that perhaps the boundary has already been breached.
“When you start to think of the nuances of how the ocean works and the importance of some regions over others, I don’t necessarily agree that we’re still in a safe place,” says Helen Findlay, a biological oceanographer at the Plymouth Marine Laboratory in England who was not involved in the report, to Mongabay.
The Planetary Health Check is the first in a series of annual reports led by PIK and organized by the Planetary Boundaries Science initiative. It builds on years of research to inform solutions on how to improve the planet’s health. The health check will also serve as a “mission-control center” for decision-making, per the statement, by using satellite data, A.I. and multiple scientific disciplines—as well as the wisdom of Indigenous peoples, which is something the researchers hope to incorporate more of in following editions.
Even if it is close to its tipping point, ocean acidification is only one of the nine boundaries necessary for regulating the planet. Each process is woven together with the others. To protect the planet, it will take a holistic approach—and according to the team, considering the boundaries all together is the best way to identify the most effective actions to lessen humanity’s impact on the Earth and urgently restore it to a safe state.
“Indeed, one of the main messages of our report is that all nine planetary boundaries are highly interconnected,” Caesar said, according to the Guardian.
Original article here








Some utilities now offer incentives to customers in exchange for the ability to control the smart thermostat when power demand is high. The utility’s control is often minimal and customers can typically override the utility setting, but a utility in Colorado recently locked thousands of customer thermostats during an “energy emergency.” If you enroll in this kind of program, be sure you understand what you may give up as a participant.
Over the course of human history, scientists believe that humans have cultivated more than 6,000 different plant species. But over time, farmers gravitated toward planting those with the largest yields. Today, just three crops – rice, wheat and corn – provide nearly half of the world’s calories.
From leaf to seed, the entirety of the amaranth plant is edible. Standing up to eight feet tall, amaranth stalks are topped off with red, orange or green seed-filled plumes. Across Africa and Asia, amaranth has long been eaten as a vegetable – whereas Indigenous Americans also ate the plant’s seed: a pseudo-cereal like buckwheat or quinoa.
For thousands of years, farmers across West Africa have cultivated fonio – a kind of millet that tastes like a slightly nuttier couscous or quinoa. Historically, fonio is considered to be Africa’s oldest cultivated cereal and was regarded by some as the food of chiefs and kings. In countries such as Senegal, Burkina Faso and Mali, fonio would be served on holy days, like at weddings and during the month of Ramadan.
In the 1940s, more than 5m acres of cowpeas were grown in the US – the majority, as their name suggests, for hay to feed livestock. But long before cowpeas – also called southern peas or black-eyed peas – came to the Americas, they were grown for human consumption in West Africa. Although cowpea production has declined in the US in recent decades, the crop is hugely important in much of Africa. Nigeria is the world’s largest cowpea producer.
In the tropics of Southeast Asia and Polynesia, taro has long been grown as a root vegetable, not unlike the potato. But as rising temperatures threaten cultivation of the crop in its natural habitat, farmers in the continental US are trying to adapt the tropical perennial to grow as a temperate annual, because it cannot survive the cold of US winters.
While many alternative crops are just plants that were grown somewhere else in the world generations ago, others have been cultivated specifically to withstand climate change.


Who would have guessed that refrigerant management would be in the top ten? Or that educating girls and family planning would be the second most important things we could do to reduce carbon emissions? It turns out that hydrofluorocarbons (HFCs, the primary current refrigerant) have 1,000 to 9,000 times greater capacity to warm the atmosphere than carbon dioxide. As for making the means of family planning more accessible and educating girls, these two rights-based solutions are projected to reduce the future global population by about a billion people, with commensurate savings in greenhouse gas emissions.
Project Drawdown has produced a framework to guide us on a new pathway of ecological recovery and sustainability, but to act, we need to be able to touch, see, and feel the existing solutions at hand. In “Drawdown 2020 — The Time is Now,” the virtual event that introduced Climate Week in New York City in September, 2020, we experience the sight, sound, and feel of just a few of those solutions, and watching it for free on the website is electrifying.




