Guardian: Advances in technology mean the amount of digital information we collectively possess is growing exponentially. Estimates suggest that by 2020 there will be 300 times more information in the world than there was in 2005. Big data has the power to transform the way corporations understand the impact of their business on the environment, and prompt them to take action on sustainability. But storing and gathering this data is costly in itself, with large data servers located across the world consuming...