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News 2026 Tunisia Water issue adressed: Too dirty

Reducing air pollution by turning carbon dioxide into oxygen using cyanobacteria

Air pollution is a serious environmental problem mainly caused by the high amounts of CO₂
emission. According to the Worldometer Tunisia’s CO₂ emissions hover near 32 million
tons annually, with recent figures indicating a roughly 3% year-over-year increase.
Therefore this project’s aim is to decrease the volume of this gas in the air.
In fact, our system is designed to reduce the atmospheric CO₂ through a biological carbon
capture while producing oxygen via a chemical reaction called photosynthesis of
cyanobacteria whose role is to absorb CO₂ from the atmosphere and produce oxygen. We
will optimize the results of this reaction since we manipulate many physical variables such
as humidity, temperature, light intensity and exposure, pH level, liquid concentration and
nutrients availability using solar energy.
This IOT approach will collect the real time data through its sensors, analyze it, then send it
to the user’s application and provide the user with real-time information of the CO₂ volume
reduced by litre and alert him in case of abnormal activity.
This device will be extremely practical since it is a multifunctional outdoor table in cafes
equipped with charging ports using solar energy in order to sustain the environment and
promote a cleaner urban space with an accuracy of oxygen production of 73%.

Contact WaterTank
Manager for Stockholm Junior Water Prize
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