A collection of talks and surveys on renewable energy technologies that have, so far, too often been dismissed as impractical or written off as outlier ideas — from harvesting power off tsunami-warning buoys in the Indian Ocean to solar, wind, hydro, biogas and biodiesel. The case made across these papers is a simple one: the need of the hour is to implement every workable means available to prevent the catastrophic climate change driven by the greed of vested interests, rather than wait for a single perfect solution.