Plastic pollution has been a serious problem since the rise of fossil fuel-based manufacturing. As tiny plastic particles find their way into something as essential as drinking water, the world needs a solution quickly.
The answer may be simpler than we expect. Researchers testing a salt-based extract from Moringa oliefera seeds were able to remove over 98% of microplastics from drinking water. The study published in ACS Omega showed that the simple filtration system could be adapted for water treatment facilities at a lower cost and requires less energy.
A father shares drinking water with his son. Photo credit Canva
‘Miracle Tree’ produces miracle seeds
The Moringa oleifera is a tropical tree native to parts of South Asia. Today, it’s cultivated on a global scale. Thriving in harsh, drought-prone regions, this “miracle tree” has been used to treat hundreds of conditions. Healthline reported that it contains 90+ bioactive compounds that help combat everything from inflammation to stress. A 2023 study in MDPI showed medicinal properties could be utilized in nearly every part of the tree, from its leaves to its roots.
However, the solution to the plastic problem comes from its seeds. Researchers ground and mixed the seeds with a salt solution to pull out positively charged proteins. This mix attracts impurities, including microplastics, like a natural magnet. Clumping and binding with the impurities in a process called “coagulation,” they then sink to the bottom.
Microplastics on top of a father’s and a daughter’s fingers. Photo credit Canva
Microplastics removed from drinking water
Researchers tested this plant-based method against the industry-standard chemical alum: aluminium sulfate. The moringa extract worked across a wider range of conditions than alum, demonstrating reliability in real-world applications. As concerns grow over the long-term impact of chemicals used in water treatment, there is a clear need to shift toward safer alternatives.
Simplifying the filtration process can significantly reduce both costs and energy demands typically required on an industrial level. This approach enables communities lacking resources to have an effective solution for plastic pollution.
An industrial water treatment plant. Photo credit Canva
Treating plastic pollution is a global problem
Developing countries face major environmental and health threats from plastic pollution. A 2024 study in Science Direct showed 60% of global plastic consumption and production comes from countries lacking proper quality control. A 2023 study in MDPI revealed that even where infrastructure exists, it’s limited and overwhelmed. Facing 120 million tons of waste annually, the situation suggests pollution is widespread and underreported.
Offering a cheap and efficient option, Moringa oliefera seeds could be an invaluable solution. But it’s still not a perfect system. The seed extract is an organic material. That means proteins and fats can remain in the water after filtration.
A 2025 study in Scientific Reports found organic matter reacting with disinfectants like chlorine is linked to health risks, including cancer. Also, stored water would be susceptible to bacterial regrowth and become contaminated over time. Researchers on the study believe this is an area of ongoing work that requires more research.
Microplastics are everywhere. With inconsistent water treatment, less monitoring, and weaker waste systems, exposure is high and poorly controlled. Moringa oleifera isn’t a flawless fix, but it’s a promising study. The seeds could eventually work alongside modern systems, bringing us closer to tackling the complex problem of plastic pollution in our water.
Teeth are like tiny biological time capsules. They tell stories about ancient diets and environments long after their owners have died and landscapes have changed.
After bones break down, tooth enamel stays hard and unchanged, even in fossilized teeth that have been buried under sediment and rock for millions of years and are now being uncovered by erosion or excavation.
Tooth enamel forms when an animal is young, and it remains chemically stable for the rest of that animal’s life. The food an animal eats and the water it drinks during its youth leave chemical signals within the enamel.
Because of that, hidden within the enamel of fossilized teeth, scientists can find traces of extinct forests, expanding savanna grasslands, shifting climates and evolving animal communities.
A small group of oryx forage in the open savanna of Awash National Park in Ethiopia, with scattered acacia trees and dry grasses illustrating the park’s semi-arid environment. Zelalem Bedaso
Over the past 30 years, my colleagues and I have been analyzing chemical traces in fossil teeth from Ethiopia’s Afar region in the East African Rift Valley – often referred to as the cradle of humanity – to uncover what animals ate there millions of years ago, around the time early human ancestors were evolving, and what the world looked like around them.
These clues from ancient meals are enabling scientists to reconstruct pictures of entire ecosystems, including forests, wetlands and grasslands that existed at the time. It’s a reminder that in a very real sense, organisms are what they eat.
Traces of ancient diets in fossil teeth
To determine which plants ancient animals ate, my colleagues and I collect a small amount of enamel powder from fossilized teeth. We then analyze this powder in the laboratory using specialized instruments that detect chemical signals preserved in the enamel.
Trees and grasses have different ways of using photosynthesis to convert sunlight into energy. These methods leave distinct chemical patterns in plant tissues, which then become incorporated into the teeth of animals that eat those plants.
By examining these chemical patterns in tooth enamel, we can determine whether animals primarily fed on trees and shrubs or on grass, providing insight into the vegetation that once covered the ancient landscape.
The author conducts fieldwork in the East African Rift, collecting samples from ancient lake and river deposits. Courtesy of Zelalem Bedaso
We can then figure out how an environment changed over time by collecting fossil teeth from different rock layers. Each layer formed at a different time in the past, so teeth found in deeper layers are typically older than those closer to the surface.
By analyzing tooth enamel from fossils across these layers, we can compare the chemical signals preserved in the teeth and see how animal diets and the plants growing in the landscape changed through time.
Adding that knowledge to data from different types of fossils, we can track long-term shifts in vegetation, climate and ecosystems.
A changing landscape in the last 4 million years
Four million years ago, the Afar region looked very different from the dry landscape you will see there today.
Fossils, including tooth enamel, reveal that the area supported a diverse range of environments. Rivers flowed through wooded areas, lakes were scattered across the landscape, and grassy plains stretched across the basin.
Fossilized teeth from animals like antelopes, giraffes, pigs, horses, hippos and elephants show a wide range of diets. Some animals browsed on leaves and shrubs, while others grazed on grass in open habitats.
The chemical signals in the teeth indicate that grasslands were expanding at the time, but forests still played an important role. They show that animals moved through this environment and adapted to the food sources around them.
Ethiopia’s Afar Depression and Awash Valley, shaped by rifting and erosion, are among the world’s most important regions for fossil discoveries of human ancestors. Some of those fossils date back 3 million to 4 million years. Zelalem Bedaso
Around 2 million to 3 million years ago, the environment shifted more drastically toward open grasslands.
Animals that relied on grass flourished, and the populations of those that didn’t adapt declined. Horses and certain antelopes, for example, developed teeth that could grind tough, gritty plants. This adaptation is recorded on their enamel.
Early humans in a mosaic world
Early human ancestors, like the famous “Lucy,” whose skeleton was discovered in the Afar region, lived in this dynamic landscape.
Fossil teeth from Australopithecus afraensis, an early human that lived in eastern Africa between about 2.9 million and 3.8 million years ago, indicate that early human relatives did not rely heavily on grass. Instead, the chemical signal in their enamel indicates mixed diets and dietary flexibility, which included fruits, leaves and roots, depending on what was available.
In a landscape that combined woodland patches and open savanna, that adaptability may have been key to survival.
This period of environmental change coincided with several important evolutionary developments and morphological changes in pre-humans. Early human ancestors were walking upright. Brain size also gradually increased, allowing for more complex behavior and problem-solving.
During this time, early humans began making and using stone tools, marking a major step in technological innovation and helping them adapt to changing environments.
Diet shapes destiny
The dietary changes in the East African Rift Valley over the past 4 million years, documented through tooth enamel, are providing important clues for reconstructing the environment in which humans’ ancestors lived and how those environments changed.
They also show that species that adjusted their diets as landscapes changed were the ones most likely to survive.
This ongoing research helps explore profound questions of how environmental shifts shaped life on Earth, including human trajectories. And that is helping humanity unlock its collective past.
Photo credit: Sam Droege/USGS Bee Lab via Flickr – This wild ground bee, Andrena nothoscordi, is typically found in the U.S. Midwest and Southeast and loves false garlic flowers.
North America’s bee populations are in trouble, but don’t blame the honey bees. While some people argue that an overabundance of managed honey bees – those raised to help pollinate crops and produce honey – is causing native bees to disappear, the evidence doesn’t support the claim.
What is true is that populations of many species of bees, including honey bees, are struggling.
Half of all honey bee colonies die every winter in the United States, on average. Commercial beekeepers experienced their highest losses on record – more than 60% of their colonies – in the winter of 2024-25. Overall, one-fifth of pollinators in North America are considered to be at risk for extinction due in large part to habitat loss, rising temperatures, extreme weather, diseases and pesticides.
We studybeesand othervitalpollinators, and we can tell you that there are good reasons to love all the bees. In fact, they’re essential.
Bees help farmers grow the foods people love to eat, everything from apples to almonds.
Along with other pollinators – such as flies, butterflies and moths – bees help nearly 80% of flowering plants produce fruit and seeds, which in turn support birds and other wildlife.
Among the pollinators, honey bees are the most important for agriculture crops. Managed honey bees, which beekeepers can move from field to field, are particularly essential in intensively farmed areas that lack the natural habitat to support wild bees.
So, why are people concerned about honey bees?
Honey bees were introduced to North America by European settlers in the early 1600s.
Since honey bees are not a native species, the most common concern you might hear is that they will outcompete wild bees for pollen and nectar. This is typically portrayed as a numbers game: If resources are limited, the more bees present on the landscape, the less food there is to go around.
Honey bees live in large social colonies and are adept at capitalizing on high-quality patches of flowers, leading to the concern that this species in particular may have a rapid, outsized effect on native bees that share the same food.
The queen bee is marked with nontoxic green paint to make her easy to find when examining the health of this Apis mellifera European honey bee hive in Maryland. David Illig via Flickr, CC BY-NC-SA
Why don’t studies find a honey bee impact on native bees?
Humans actually know little about bee interactions. The U.S. has more than 4,000 native bee species, but there is enough data to estimate population sizes and ranges for less than half of them. Meaningful data examining the effects of honey bees on other species are even more scarce.
In a recent analysis, we found that only 15% of 116 published studies on resource competition involving honey bees measure how competition from honey bees affects the survival, reproductive output and long-term population trends of native species.
Bee populations face several threats, including pesticides and losing habitat to urbanization and agriculture. Andony Melathopoulos
The majority of published studies on honey bee and wild bee competition address different versions of a narrow question: Do honey bees and native bees visit the same plants?
Because honey bees are “super generalists” that thrive worldwide well beyond their native range, most scientists would predict that the answer to this question is a resounding “yes.”
However, about half of the research suggests that honey bees don’t change the way native bees go about their day at all. From the perspective of a wild bee, the honey bees simply don’t exist in their world.
Different bee species can coexist with very little evidence of direct interaction. An analysis of bee communities measured across diverse agricultural, urban, grassland and forested environments found the abundance of honey bees and the abundance of native bees were positively associated about five times as often as they were negatively associated. In other words, rather than landscapes supporting one bee species at the expense of another, the same habitatssupport both.
Bees species can be found just about everywhere in the U.S., as this map, modeled from 3,158 species found in museum collections, shows. But some regions, such as the Southwest deserts, are particularly rich in bee species, with the color scale representing the estimated number of species. Paige R. Chesshire, et al., 2023, CC BY
Calls to restrict honey bees from certain locations also often miss a key reality: Native bee hot spots and urban and commercial beekeeping rarely overlap.
Beekeeping is anchored in agricultural lands. North America’s rarest bees thrive in environments like the Sonoran Desert – habitats that are poorly suited for managed colonies.
Research that has artificially introduced hives into natural areas like the high Sierra – places beekeepers don’t typically go – has generated competition that left less pollen and nectar for the native bees. But frequently competition involves common native bees that are not under threat.
Bumble bees transport pollen on their legs as they move from flower to flower, bringing some of it home while pollinating plants in the process. Andony Melathopoulos
So, if honey bees aren’t to blame, what is?
The top drivers of pollinator declines are considered to be land use – the spread of cities and agriculture, as well as the way land is managed – along with rising temperatures, extreme weather and pesticide use.
Agriculture and urbanization reduce the amount and diversity of flowering plants, and droughts can reduce plant flowering and the resources bees rely on. Pesticides can reduce bees’ ability to lay eggs and care for their offspring, or they can kill bees outright.
As temperatures rise, wild bee populations are expected to decline there. Warmer winters mean bees active in spring emerge earlier from their nests, and increased spring rain and temperature fluctuations can limit their ability to feed their offspring, meaning fewer bees.
The western bumble bee, Bombus occidentalis, was once widespread and abundant across western North America, but it has been in decline since the late 1990s. Long-term monitoring of its populations from 1998 to 2020 shows the primary reasons are land management changes, increasing temperature, drought and pesticide use.
What can you do to support pollinators?
The biggest threat to pollinators is the disappearing variety of flowering plants.
You can help reverse this by filling your garden with more flowering plants, trees and shrubs to give bees, butterflies and other pollinators a variety of food sources.
Planting wildflower gardens in your yard can help many kinds of pollinators, including bees. Clare Rittschof
You can also advocate for bee-friendly behavior in your community, such as creating pollinator habitats in public and private spaces and reducing the use of harsh pesticides and herbicides. Planting more flowers in parks and along roadsides, and protecting wildlands where the rarest native bees live, can help keep these wonderful species thriving.
East Lawn Cemetery in Ithaca, New York, is “home” to dozens of people who’ve been laid to rest. However, it is not just the home of departed humans. It is also the underground burrow housing over five million bees.
While there have been records of bees emerging from the grounds of East Lawn Cemetery since 1935, it wasn’t until 2023 that a study of its scale was measured. In April of that year, a team at Cornell University began fieldwork by setting up 10 emergence traps made of tents over the bees’ nest. These traps collected insects in a plastic jar with a 70% ethanol solution.
There Are 5.6 Million Bees Living Beneath This Cemetery Beneath a quiet cemetery in New York, scientists discovered millions of bees living underground, building tunnels, pollinating, and surviving completely unnoticed for decades. While everything above changes, generations come and go, this hidden world continues without interruption, a reminder that life moves forward with or without us. #NatureMystery#DidYouKnow#HiddenWorld#ScienceFacts#creatorsearchinsights
By analyzing the number of bees caught in these traps, along with other data, they calculated that as many as 5.56 million bees live in the cemetery’s ground. To put it in perspective, the typical honeybee hive contains around 30,000 bees.
“I was completely floored when we did the calculations,” Cornell University entomologist Bryan Danforth told Scientific American. “I have seen published estimates of bee aggregations in the hundreds of thousands. But I never really imagined that it would be 5.56 million bees.”
Many might be puzzled about bees living underground rather than in a typical hanging hive. In actuality, though, the majority of bees live underground. The miner bees (Andrena regularis) found in the cemetery actually live solitary lives within burrows. They nest there during the winter months and emerge in the spring to pollinate, mate, and dig burrows for their larvae. For New Yorkers who enjoy apples and blueberries, these bees are responsible for helping them bloom and grow in the spring.
“This species overwinters as adults, which is relatively rare, and that’s part of the reason why they come up out of the ground so early in spring, timed to the apple bloom,” said study author Steven T. Hoge.
What are bees doing living at a cemetery?
But why is the cemetery a popular living space for these bees?
“The peacefulness, the lack of pesticides, and the fact that, overall, the ground is rarely disturbed, all make cemeteries good habitat for bees,” Danforth told Science Alert.
Given the huge population, the Cornell University researchers state that the cemetery is actually very important for the area’s ecosystem. Should the cemetery grounds be disturbed or altered, it could impact the vegetation and crops in the surrounding areas. In fact, there are some cemeteries partnering up with beekeepers and other bee conservationists.
Keeping the bees (and the dead) in peace
Danforth and his colleagues have encouraged a global community science project to help the bees. The purpose is to study, protect, and conserve these ground-dwelling bees and their habitats.
“These populations are huge, and they need protection,” Danforth said. “If we don’t preserve nest sites, and someone paves over them, we could lose in an instant 5.5 million bees that are important pollinators.”
If you notice a bee coming out of the ground, leave it be and spread the word. It could be helping restock your grocery store or farmers market with quality produce.
