Airing in April, the show follows ecologist and wildlife expert Dusty Gedge, who is attempting to bring an indoor rainforest to London's Westfield Centre.
Speaking about the project, Gedge said: "This is a unique endeavour for someone who creates habitats at roof level. No-one has attempted to create a rainforest on a roof before. It is certainly an interesting challenge but pretty daunting too."
Sky1 exec producer Mark Aldridge said: "This programme is a truly unique endeavour, which has drawn upon the expertise of individuals from across Sky and has brought together an array of people from across many different walks of life from outside of Sky. The event is a testament to the power of people pulling together and highlights an environmental issue that affects us all."
Rival Media's Steve Wynne said: "This is one of the most challenging projects Rival have ever been involved with. Dusty has only 70 days to build a rainforest on a rooftop. It's an extraordinary experiment and we still don't know if he's going to achieve it or not."
The programme is part of a Rainforest Week, which will include a range of programmes aiming to raise awareness of issues facing our planet. Other shows across Sky's channels include Steve Jones's The Jones Boys' Amazon Adventure, the Donald Sutherland-narrated The Mighty River and and Nat Geo Wild's Backyard Zoo, My Lion Family and Swamp Men.