A group of architects are proposing building a skyscraper that would house a small forest to act as an air cleaner near places of pollution production – a vertical forest.

‘It will also cool the air during the hot summer months via the temperature-lowering properties of hundreds of trees.

‘We thought of the CO2 Scraper as a way to place trees in areas where they would ordinarily be difficult or impossible to plant such as near a factory, major road or perhaps even in a densely populated urban area.

‘The idea here was to imagine a structure with relatively small footprint in terms of the amount of ground it covers.’

Scientist and sustainability specialist Joep Meijer, founder of theRightenvironment, has praised the ‘outstanding’ design.

He said: ‘The CO2 Scraper is an outstanding example of the kind of ideas we need to look at now.