Резиме:This project addresses global environmental challenges such as climate change, urban pollution, and plastic waste through a sustainable, low-cost solution. Its main goal is to reduce atmospheric CO₂ using algae capable of photosynthesis, which absorb CO₂ and release oxygen, mimicking the natural role of trees. By constructing the bioreactor from recycled plastic bottles and reused materials, the project promotes recycling and reduces environmental waste. Additionally, it improves air quality by filtering aerosols and harmful particles, which is especially useful in indoor spaces such as classrooms and laboratories. The system is designed to operate autonomously with solar-powered energy, demonstrating the potential of renewable sources. Beyond CO₂ capture, the resulting algal biomass can be reused as compost or plant fertilizer, supporting a circular ecological process. Overall, the project combines biological innovation and environmental awareness to provide a sustainable method for improving air quality and mitigating climate change.