Connecticut student Raji Doshi, 12, designed an algae and calcium system to reduce ocean acidity; she is now competing for a $25,000 science prize

Raji Doshi (Image Credit: Young Scientist Lab) A 12-year-old student from Connecticut is drawing attention for tackling one of the world's biggest environmental challenges with an innovative science project.

According to the Young Scientist Lab, Raji Doshi designed a project that proposes using algae and natural calcium (aragonite) buffers to help reduce CO₂-driven ocean acidification.

Her innovative idea has earned her a place among this year's finalists, where she is now competing for the competition's $25,000 grand prize.A project inspired by a global environmental challenge Ocean acidification is a major concern for scientists because the world's oceans absorb a significant amount of the carbon dioxide released into the atmosphere.

As more carbon dioxide dissolves in seawater, the water becomes more acidic, making it harder for corals, shellfish and other marine organisms to build and maintain their shells and skeletons.According to her finalist profile on the Young Scientist Lab website, Raji's project explores whether combining algae with natural calcium (aragonite) buffers can help counter this process.

The idea is based on the natural ability of algae to absorb carbon dioxide during photosynthesis, while calcium compounds may help buffer acidity by increasing the water's alkalinity.Rather than relying on a single solution, her project investigates how these two natural processes could work together to create healthier conditions for marine ecosystems.

How the proposed system works According to Raji's project summary, the proposed system uses natural calcium (aragonite) buffers, which may help counter rising acidity by increasing seawater alkalinity.

Since carbon dioxide is one of the main drivers of ocean acidification, reducing its concentration could help slow changes in seawater chemistry.By combining algae with natural calcium (aragonite) buffers, the proposed approach aims to create a more balanced aquatic environment that could benefit marine organisms vulnerable to acidic conditions.

The project explores how these biological and chemical processes could work together to help reduce the impacts of ocean acidification.While the project is still a student research initiative rather than a commercially tested technology, it reflects an innovative approach to addressing a complex environmental issue.

It also demonstrates how scientific concepts from biology and chemistry can be combined to explore practical solutions to real-world problems.A chance to showcase young scientific talent Raji's project has secured her a place among the finalists in the 2026 3M Young Scientist Challenge, a competition that recognises young innovators for developing creative solutions to important global issues.As a finalist, she will present her work before a panel of judges while competing for the $25,000 top prize.

The competition also gives participants an opportunity to receive mentorship, refine their ideas and gain recognition for their scientific research.Although the outcome of the competition is yet to be decided, Raji's selection as a finalist highlights the growing role that young students can play in environmental innovation.

Her project encourages discussion about sustainable approaches to protecting marine ecosystems while demonstrating how curiosity and scientific thinking can inspire new ideas.By focusing on ocean acidification, a challenge affecting oceans around the world, Raji's project illustrates how young researchers are increasingly contributing fresh perspectives to some of today's most pressing environmental issues.

Whether her proposed system ultimately leads to further research or inspires future innovations, her work reflects the power of science education in encouraging the next generation of problem-solvers.