The art (and science) of cleaning the air

On a stretch of walls along Manila’s busiest roadway is a painting of colourful, lung shaped trees – but these painted trees are not merely a representation of trees, they are acting as if they were alive. It is not simply a case of art imitating life, it’s actually paint science: just as trees act as lungs of the earth by converting carbon dioxide to oxygen through photosynthesis, these painted trees are acting as lungs of the city by converting noxious air pollutants to harmless substances through photocatalysis.

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