Zhengliang Wu (DE)

Green City Solutions’ mission is to make clean urban air profitable. Their vision is to mitigate climate change and fight air pollution through a highly intelligent and profitable climate infrastructure for sustainable and liveable cities of tomorrow.

The green start-up invented the CityTree, a four-meter high freestanding installation that uniquely combines plants with the Internet of Things. Moss cultures have the ability to attract air pollution from the surroundings and a surface of 4 x 3 meters can “eat” as much fine-dust as 275 trees. Each unit takes 1% of the space and 5% of the costs of a real tree. Smart sensors facilitate monitoring and control. Solar panels and rainwater retention minimise maintenance. The “tree” could help cities meet pollution-reduction targets and even reduce temperatures.

Green City Solutions works on its vision of greener, smarter and more liveable urban environments by helping cities worldwide to become free of air pollution. The pilot project “CityTree Scaler” in the city of Modena aims to gain high quality data on the impact of the biotechnological plant filters in a real urban environment. Green City Solutions aims to realise more projects like this and implement many CityTrees all over Europe, and eventually also expand to Asia.


Green City Solutions
Zhengliang Wu (DE)

Company Green City Solutions
Country Germany
Founder & CEO Zhengliang Wu
Postcode Lottery Green Challenge Runner-up 2016
What Reduction of urban air pollution
How With smart air filtering green installations
Founded in  2014
Employees  24
Website www.getacitytree.com

green man

Zhengliang Wu


Runner-up 2016


Design / Cradle to Cradle



“The honour of being chosen in such a well-known competition and by an expert jury raises awareness and creates credibility of our company and our product.”