Rooftop farms and urban gardens are popular options for providing food in cities while mitigating heat islands, increasing building thermal insulation, and improving air quality. However, these plants often end up smaller and less healthy, as they suffer from higher solar radiation, wind exposure, and low soil moisture.
A team at Boston University, in the United States, conducted a study to test reusing CO2 from building exhaust systems as a form of fertilizer to combat these challenges. To explore this, they grew corn and spinach on the rooftop of a campus building.
