In the streets of Girona, a sunny town near Barcelona, you can find an eco-friendly bus with a garden on the roof. It’s not an artistic work, but an experiment to expand the urban green area, in order to reduce CO2. Called Autocultural, it’s a classic bus with a thin layer of hydroponic components on the top, allowing the plants to grow without overloading to the vehicle's structure with the weight of the soil. Public transporters drivers can now add green thumb to their CV.
Source: The Sunday Times