Bacteria that let plants feed themselves from the air
In an age when feeding the world and protecting it have long seemed like opposing ambitions, Brazilian microbiologist Mariangela Hungria has spent decades quietly dissolving that contradiction. Working from Embrapa, Brazil's agricultural research agency, she has harnessed the ancient partnership between plants and soil bacteria to reduce humanity's dependence on synthetic fertilizers — a breakthrough now recognized by Time magazine's 2026 list of the world's 100 most influential people. Her science, already embedded in 85 percent of Brazil's soy production, reminds us that some of the most transformative solutions are not invented but rediscovered, written in the language of living organisms rather than industrial chemistry.
- A century of synthetic fertilizer dependency is being challenged by a microbiologist who found the answer not in a laboratory flask, but in the soil itself.
- The tension is real: chemical fertilizers feed billions but poison waterways and pump greenhouse gases into an already strained atmosphere.
- Hungria's nitrogen-fixing bacteria now underpin 85% of Brazil's soy harvest, saving farmers $25 billion a year while preventing 230 million tons of CO2 equivalent emissions annually.
- Her 2025 World Food Prize and now a place on Time's global list signal that the scientific establishment is catching up to what Brazilian fields have known for years.
- The technology is crossing borders, and the world is beginning to ask not whether biological fertilization works — but how fast it can scale.
Time magazine's 2026 list of the world's 100 most influential people includes Mariangela Hungria, a Brazilian microbiologist whose career at Embrapa has centered on one of agriculture's most stubborn problems: how to grow enough food without destroying the systems that make growing food possible.
Hungria's focus is soil bacteria capable of fixing atmospheric nitrogen directly into a form plants can use — effectively allowing crops to fertilize themselves. This is not a new phenomenon in nature, but refining and scaling it for modern agriculture required decades of patient research. The payoff has been extraordinary. Today, roughly 85 percent of Brazil's soy production relies on these biological inoculants rather than synthetic fertilizers, saving farmers an estimated $25 billion each year and preventing the release of approximately 230 million tons of CO2 equivalent annually.
For much of the past century, synthetic fertilizers represented an unavoidable compromise: essential for feeding a growing global population, but damaging to waterways and the climate. Hungria's work reframes that trade-off entirely, demonstrating at national scale that biological alternatives are not just viable but economically superior.
The recognition she is receiving — Time's list follows the 2025 World Food Prize, agriculture's highest honor — reflects a wider reckoning with what meaningful innovation looks like in an era defined by climate pressure and resource scarcity. As her methods spread to other countries, the conversation has shifted from possibility to pace: the science is proven, and the world is deciding how quickly it is willing to change.
Time magazine released its annual list of the world's 100 most influential people on Wednesday, and among them is Mariangela Hungria, a Brazilian microbiologist whose decades of work have quietly reshaped how the world feeds itself.
Hungria works at Embrapa, Brazil's agricultural research agency, where she has spent her career studying soil microbes and their potential to replace chemical fertilizers. She is an agronomist and microbiologist by training, but her real expertise lies in understanding how certain bacteria can allow plants to pull nitrogen directly from the air—a process that dramatically reduces the need for the synthetic fertilizers that have been the backbone of industrial agriculture for over a century.
Chemical fertilizers transformed farming. They made it possible to grow enough food to feed billions of people. But they come with a cost. Overuse contaminates waterways through runoff and contributes significantly to greenhouse gas emissions. For decades, this seemed like an unavoidable trade-off: feed the world or protect the environment. Hungria's work suggests there is another way.
The bacteria she has studied and refined allow crops to fix nitrogen from the atmosphere on their own, cutting the need for chemical inputs. In Brazil, this technology is no longer theoretical—it is standard practice. About 85 percent of the country's soy crop now relies on these nitrogen-fixing microorganisms. The scale is staggering. Brazilian farmers save approximately $25 billion annually by using these biological solutions instead of synthetic alternatives. At the same time, the shift prevents the release of roughly 230 million tons of carbon dioxide equivalent into the atmosphere each year.
These are not small numbers. They represent a fundamental shift in how one of the world's largest agricultural producers operates. And they hint at what might be possible elsewhere. Hungria's research is already being adopted in other countries, suggesting that biological approaches to fertilization could reshape agriculture on a global scale.
The recognition from Time reflects a broader shift in how the world thinks about innovation. Hungria was also awarded the World Food Prize in 2025, often called the Nobel Prize of agriculture, one of the highest honors in the field. Her work sits at the intersection of food security, environmental protection, and economic benefit—the kind of problem-solving that defines influence in an era of climate change and resource constraints. As her technologies spread beyond Brazil, the question is no longer whether biological alternatives to synthetic fertilizers are possible. It is how quickly the rest of the world will adopt them.
Citações Notáveis
Her work concentrates on developing bacteria that allow plants to fix nitrogen directly from the atmosphere, reducing the need for chemical inputs— Time magazine's profile of Mariangela Hungria
A Conversa do Hearth Outra perspectiva sobre a história
Why does a soil microbiologist end up on a list of the world's most influential people? That seems like an unusual choice for Time.
Because the scale of what she's done is genuinely massive. We're talking about 85 percent of Brazil's soy production using her research. That's not academic—that's the foundation of a major food system.
But she didn't invent the bacteria themselves, right? Nitrogen-fixing microbes exist in nature.
True. What she did was understand them deeply enough to make them work reliably at scale, in ways farmers could actually use. That's the harder part.
And the $25 billion savings—that's real money that stays in farmers' pockets instead of going to fertilizer companies?
Exactly. Plus the carbon reduction is equivalent to taking millions of cars off the road. It's economic and environmental at the same time.
Does this technology work everywhere, or is it specific to Brazil's climate and crops?
It's already spreading to other countries, so it's not just a Brazilian story. But adoption takes time. Farmers need to trust it, and the infrastructure has to be in place. That's probably why the recognition matters—it signals that this is the direction agriculture needs to go.