Product series "The tile eats smoke" will help to improve air quality by neutralizing nitrogen oxide because vehicles emanate their air pollutants and people burn fossil fuels such as coals.

The tiled roof is coated with a layer of titanium dioxide that it oxidizes air pollutants under sunlight and turns into harmless calcium nitrate. Under the rain, calcium nitrate will drift to the ground and it can become fertilizer for trees in the garden.