In the battle against urban pollution and the dwindling quality of life in crowded cities, Serbia has unveiled a cutting-edge solution that seems straight out of science fiction – liquid trees. These trees do not have roots or leaves. They are futuristic devices that hold the key to revolutionizing air quality control.

Officially known as bioreactors, these tanks contain a powerful mix of water and microalgae. The magic happens within these tanks as microalgae, fueled by sunlight, water, and carbon dioxide, engage in photosynthesis to capture CO2 and release oxygen. In essence, they function just like trees – purifying the air.

Microalgae, incredibly tiny organisms, breathe life into these tanks. As they inhale, pollutants are absorbed, while pure, revitalized air is exhaled. The more they work, the greener they become, akin to the growth of a real tree. This innovation, aptly named Liquid 3, addresses the pollution woes of urban areas where space for traditional parks and trees is scarce.

One Liquid 3 unit can clean as much air as a 20-year-old tree. What's more, these solar-powered marvels are remarkably efficient, quick to build and instantly effective.

But the ingenuity doesn't stop there. These bioreactors in Serbia double as benches, offering urban dwellers a comfortable spot to relax. They even provide power outlets for charging mobile phones.

While Liquid 3 currently graces the streets of Belgrade, the future holds exciting prospects, with plans to introduce these urban air saviors in cities like Paris, New York, and New Delhi. In a world where planting new trees in sprawling metropolises is a challenge, Liquid 3 emerges as an inspiring and practical solution to combat pollution and enhance the urban environment.