The Cannes Lions Festival of creativity never fails to surprise. Case in point, this year's Grand Prix award for outdoor advertisement was awarded to a beer-maker turned biofuel distributor. Heineken New Zealand's work for DB Export took home the prize with their appropriately named campaign "Brewtroleum." The campaign leverages DB Export's work to address the looming environmental and political crisis derived from the world's dependence on oil. The company proposes to turn its spent brewing yeast into usable biofuel drivers can fill their cars with. Although it may seem far-fetched, the campaign worked. DB Export managed to sell their branded biofuel at over 60 gas stations across New Zealand.