I-TASC is the Interpolar Transnational Art Science Constellation. I-TASC is an official project of the International Polar Year 2007-2008. The project was conceived by Thomas Mulcaire and Marko Peljhan. I-TASC is a decentralized network of individuals and organisations working collaboratively in the fields of art, engineering, science and technology on the interdisciplinary development and tactical deployment of renewable energy, waste recycling systems, sustainable architecture and open-format, open-source media. I-TASC is a lichen-like structure sharing and integrating local knowledge, resources and skills across six continents in order to symbiotically engage with the air, ocean, earth and space commons