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To combat soaring population and pollution problems in China, a French architecture firm is looking up - and going green.

Vincent Callebaut Architects has designed a series of six sky-high "farmscrapers," futuristic residential and business towers equipped with wind turbines and solar cells to create renewable energy.

"Our view is to turn each constrain into an opportunity and convert waste into renewable natural resources," the company said in a statement.

The eco-friendly castles in the sky, planned to go up in the Chinese city of Shenzhen, will measure 1,300 feet high and have 111 floors each.

Each pebble-shaped level houses a suspended garden on its exterior. Water generated by the urban, vertical farms will be recycled by special systems within the buildings.

While hopefully slashing carbon dioxide emissions, the innovative skyscrapers will also be home to apartments, office units and leisure spaces.

Shenzhen is one of the most rapidly expanding cities in Asia with a population of 3.5 million and counting.

Critics remain doubtful over whether the ambitious plan is actually possible. But the company said the project, dubbed Asian Cairns, is only a sign of what's to come.

"It is a prototype to build a green, dense, smart city connected by technology and eco-designed from biotechnologies," it explained. "Its design is especially important during a time of hyper growth and accelerated urbanism."

Vincent Callebaut, the main architect of the company, is well-versed in far-reaching, environmentally-conscious projects.

One of his most well-regarded designs, Lilypad, is a "floating ecopolis" designed to serve as a refuge for populations displaced by climate change.

"It is a true amphibian, half aquatic and half terrestrial city, able to accommodate 50,000 inhabitants and inviting biodiversity," he told CNN back in 2008.

The cutting-edge creation, however, has yet to come to life.