Study also finds Portland's residents are willing to pay for the benefits of green roofs.

The Biowall — that 22-foot- wide, 80-foot-tall functional wall of air-purifying plants that proudly stands in the building’s lobby— has been undergoing renovations since August.

ADM Landscape Corporation has introduced the Freedom series of portable green walls in the greater New York metro area.

Whoever said the living was easy in summertime never lived in a city between the months of June and August.

The real challenge is how to make the existing city fabric consisting of thousands of older, existing buildings more sustainable, through retrofitting clever and efficient systems.

Architecture office Woods Bagot has covered an apartment block in San Francisco's Dogpatch neighbourhood with a green wall that climbs up five floors.

Noki Farms will sell fresh produce in an indoor retail space