Spain Introduces Liquid Trees to Combat Urban Pollution

Spain has launched an innovative solution in the form of 'liquid trees,' designed to address the severe lack of greenery in urban environments. These structures act as urban photobioreactors filled with microalgae that process carbon dioxide and emit oxygen, effectively performing the role of traditional trees without requiring soil or space to grow. Developed following a United Nations Development Program initiative, the first prototype, named LIQUID 3, has been installed in Stari Grad, Serbia, validating its concept prior to deployment in Spanish cities like Madrid and Barcelona.

The introduction of liquid trees represents a significant advancement in sustainable urban infrastructure, particularly in heavily polluted cities struggling with air quality. Unlike conventional trees, these engineered solutions can thrive in highly contaminated areas where traditional trees would fail, enabling cities to improve air quality without relying on increased green space. The initiative not only addresses local ecological challenges but also enhances Spain's capacity for innovative environmental solutions, promoting a shift towards greater independence in urban air quality management.