How many GHG emissions is biofuel expected to save: demand uncertainty

The speaker in this video, Jeremy Bentham (of Shell, not of UCL, fortunately, otherwise it would be most creepy), raises some other issues with calculating the potential GHG emissions savings of biofuels over time related to uncertainty, namely the future population growth.

7 days ago, the global population reached 7 billion people (Guardian, 2011) and if human numbers and the global economic development continue increasing at the expected rate, energy demands will be enormous in the future. This exact energy demand extent and the management strategies chosen in the future, such as how much of the energy demand will be accounted for by biofuels and how and where the biofuels will be produced, are a source of major uncertainty. As will be shown later in the blog, depending on the scenario adopted in the future, a great variety of GHG savings or emissions may result.