A building concept envisioned for the new urban boom in China is proposing an advanced skin system that, similar to the stomata on the under side of the leaf, provides opportunities for controlling the gaseous exchange between the interior and exterior of the building. The system also has the potential for controlling quality of light and ventilation throughout the entire structure.
There isnt much about the project online, but from what we have gathered but it was featured originally on Inhabitat in this article. It is also evident that Philips has some kind of partnership with the design proposal from the project being featured on their promotional design probes page on this page. You can see a more full treatment of the Habitat 2020 project on the Philips archive by visiting this internal page. There seems to be a short brief, videos and an opportunity to download high resolution renderings of the concept.