Kiara Nirghin

At 16, this woman turned orange peels into a polymer that keeps crops alive in drought.

In 2013, South Africa was in crisis.

The worst drought in 30 years was killing livestock, decimating harvests, and pushing food prices up.

Kiara Nirghin was living through it, and fighting her own battle.

At 13, she was diagnosed with bilharzia, a parasitic disease, and months later bacterial meningitis.

She spent over a year in a hospital bed, in pain, watching her country’s farmland dry up.

When she finally returned home, she decided to create a solution to drought that was cheap, scalable, and sustainable.

Her breakthrough came from watching her older sister change a diaper.

She was stunned at how much liquid it could absorb.

Research told her why: super-absorbent polymers (SAPs).

These powders could hold huge amounts of water compared to their weight.

In agriculture, they worked like a mini reservoir in the soil, keeping plants alive when rain didn’t come.

The problem? Commercial SAPs were expensive, chemical-based, and non-biodegradable.

Farmers in drought-hit regions couldn’t afford them.

So Kiara decided to make her own.

She started experimenting in her kitchen.

Over 45 days and three major trials, she turned waste from juice manufacturing (think orange peels and avocado skins) into a fully biodegradable, super-absorbent polymer.

The results?
- Holds 300 times its weight in water
- Increases plant survival in droughts by 84%
- Can improve food security by 73% in affected regions
- Made entirely from waste that would have gone to landfill

Kiara entered her invention into the Google Science Fair, a global competition for students aged 13 to 18.

Out of thousands of entries from across the world, she didn’t just win her category, she won the Grand Prize.

She also took home the Global Community Impact Award and $50,000 in scholarships.

TIME named her one of the Most Influential Teens.

The UN named her a Young Champion of the Earth.

Scientific American called her work inspiring.

The BBC, The Guardian, and media outlets across the globe told her story.

Alongside her environmental work, she studied computer science at Stanford University, specializing in AI and bio-computation.

In 2022, at just 22 years old, she co-founded Chima, a Y Combinator–backed AI company that helps enterprises connect their own customer and operational data to generative AI models.

She became a Thiel Fellow, joined Google’s AI Impact Fund, partnered with the 776 Foundation, and was recognized by Forbes 30 Under 30.

She’s spoken at the United Nations’ International Women’s Day.

Written for TIME, Fast Company, and The Economist.
And published her autobiography: Youth Revolution #BeTheChange.