http://www.futuretim...tm#.UWz8ESTD_ct
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The BIQ House took around three years to build, with design and construction costs of €5 million ($6.5 million). It features "bio-reactors" in the facade which contain microalgae. These live in a water solution, with nutrients and carbon dioxide provided by an automated system. Each of the 129 tanks can be rotated towards the Sun, generating biomass that can either cool or heat the building, while serving as a renewable energy source.