Brazilian scientist Mariangela Hungria transforms agriculture through biological innovation

Mariangela Hungria sits at the center of a quiet revolution in how Brazil grows food. The Embrapa researcher, based in Londrina in the state of Paraná, has spent four decades developing biological alternatives to the chemical fertilizers that once seemed like agriculture's only path forward. Last year, TIME magazine named her one of the hundred most influential people on Earth. Forbes followed, listing her among ten global leaders shaping the future of agribusiness. These recognitions arrived not for theoretical work, but for technologies that have fundamentally altered how the country produces its most valuable crop.

Hungria was born in São Paulo and raised in Itapetinga, a small town in the interior. She studied agronomy at the University of São Paulo's prestigious Esalq campus, then earned a master's degree in soil science and plant nutrition from the same institution. Her doctoral work in soil science came from the Federal Rural University of Rio de Janeiro, followed by three postdoctoral fellowships in the United States and Spain. In 1982, she joined Embrapa, Brazil's state agricultural research corporation. A decade later, in 1991, she moved to the soy division in Londrina, where she has remained ever since.

When Hungria began her work in soil biology, the agricultural world was intoxicated by chemical solutions. Pesticides and synthetic fertilizers promised efficiency and control. The path she chose—studying how microorganisms could do the work of expensive inputs—seemed quixotic to many. "It's hard to hear that what you're doing has no future," she recalled in an interview. "But I never thought for a moment about abandoning what I believed in." What sustained her was institutional support from Embrapa, a public company willing to fund long-term research when the market saw no immediate profit.

The numbers tell the story of her vindication. Today, eighty-five percent of Brazil's soy producers use nitrogen-fixing bacteria annually. More than half of them—fifty-seven percent—specifically apply Azospirillum brasilense, a microorganism that promotes plant growth while replacing expensive chemical nitrogen. The technology has spread beyond soy. Twenty-two percent of summer corn cultivation now uses these biological inputs; in winter crops, the figure reaches forty-two percent. Adoption rates this high are rare in agriculture, where farmers are typically conservative about changing established practices.

The environmental arithmetic is striking. In the most recent harvest season, replacing chemical nitrogen fertilizers with biological alternatives prevented the release of two hundred sixty million tons of carbon dioxide into the atmosphere. That single number captures the scale of what Hungria's work has accomplished—a reduction in emissions equivalent to taking millions of cars off the road, achieved not through regulation or sacrifice, but through better science.

As she approaches the end of her career, Hungria has set a new target: recovering Brazil's degraded pastures through microbial intervention. The country has roughly eighty million hectares of pastureland that has lost productivity over decades of overuse. If microorganisms could restore the quality of forage for cattle on these lands, it would free that acreage for crop production without clearing a single tree. "We could double or triple national production without cutting down a forest," she said. The potential is enormous, but so are the obstacles.

Hungria has become an advocate for a different kind of investment in science. Agricultural research, she argues, cannot be rushed. Projects need stable funding for at least ten years to yield results. Current government grants typically last two or three years—a timeline that forces researchers to chase short-term outcomes rather than pursue the patient work that transforms entire industries. "Investing in science produces economic, social, and environmental returns," she said, a statement that sounds obvious until you consider how rarely it shapes policy. Her warning is not abstract. It is a plea from someone who has already changed the world, asking for the conditions to do it again.