A 16-year-old South African schoolgirl has won the grand prize at Google’s science fair for using orange peel to develop a cheap super-absorbent material to help soil retain water.
Kiara Nirghin beat students from around the world for a $50,000 (£38,000) scholarship with her “fighting drought with fruit” submission.
Her work was in response to the recent drought that has hit South Africa . The drought, the worst since 1982, led to crop failures and animals dying.
Ms Nirghin, a student at the Anglican Church-founded St Martin’s High School in the main city Johannesburg, said three experiments over 45 days resulted in her coming up with the “orange peel mixture” as an alternative to expensive and non-biodegradable super-absorbent polymers (SAPs).
It was made out of waste products from the juice-manufacturing industry, she said.
The student, who was awarded the prize at the annual fair in California, said she hoped it would help farmers save both money and their crops.
The competition was open to children from the ages of 13 to 18.