13-year-old inventor turns a growing climate challenge into a practical farming solution with an award-winning innovation
His low-cost invention is now among the finalists in one of America's biggest young scientists' competitions
By Chris Ola
Roy Kim,
a 13-year-old student from Oregon, has developed an innovative device that
extracts water from moisture in the air, offering a potential lifeline to
farmers struggling with worsening drought and shrinking water supplies.
The young inventor, who attends Whitford Middle School in
Beaverton, believes today's problems deserve immediate action. Guided by his
personal motto, "Do what you can do tomorrow, today," he
designed a system that transforms airborne moisture into usable water for
crops, combining science and engineering to tackle one of agriculture's biggest
challenges.
His invention comes at a time when rising global
temperatures are placing increasing pressure on farming. Many growers depend on
rainfall, rivers and underground water to irrigate their fields, but these
traditional sources have become less reliable in many areas because of changing
weather patterns and prolonged dry seasons.
At the centre of Kim's invention is a Peltier module, an electronic component
that creates a temperature difference when powered by electricity. One side
becomes hot while the other cools rapidly, allowing moisture in warm air to
condense into liquid water.
Explaining how the system works, Kim said the chamber first
draws in air through its heated section, where a filter and heating element
prepare the airflow before a fan pushes it towards the cooled surface. As the
air temperature drops, tiny droplets of water form naturally and are channelled
into a funnel before flowing through a valve that supplies nearby plants.
The device goes beyond simply producing water. Kim equipped
it with a soil moisture sensor that determines when crops actually need
watering, helping to avoid unnecessary irrigation. Temperature and humidity
sensors also monitor surrounding conditions and automatically regulate airflow
to keep water production as efficient as possible.
After refining the design through repeated testing, the
prototype produced around 10
millilitres of water over two hours, reaching a peak efficiency of 135.8 grams per kilowatt-hour.
"Through this project, I didn't just create water. I
combined natural processes with engineering to develop a sustainable solution
for farming," Kim said.
The invention has earned him a place among the top 10 national finalists in the 3M Young Scientist Challenge, an
annual competition organised by 3M and Discovery Education for American
students in grades five to eight. The programme encourages young people to
create practical solutions to everyday problems through science and innovation.
Kim said he entered the competition to raise awareness of
both the growing water crisis and the possibilities offered by new technology.
"I wanted to showcase my invention to people around the
world. If more people are aware of this problem and the potential solution, the
problem might be able to de-escalate," he said.
His project addresses a significant issue. According to the US Department of Agriculture,
irrigation accounted for 47% of all
freshwater withdrawals in the United States between 2010 and 2020, while
more than 212,000 farms relied
on natural water sources to sustain crop production during that period.
Although still in its early stages, Kim believes his
invention could become part of a broader effort to reduce agriculture's
dependence on increasingly scarce water resources. Looking ahead, he hopes to
build a career as an environmental engineer focused on solving global challenges
through practical innovation.
The winners of the 2026 3M Young Scientist Challenge will be announced during the
competition's final event on 12 and 13
October, where Kim's invention will compete alongside other
groundbreaking ideas from across the United States. Regardless of the outcome,
his work has already shown how curiosity, determination and creative thinking
can inspire practical answers to some of the world's most pressing
environmental problems.
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