... scarcity. The 3. Working Group on Biofuels focuses on the specific topic of biofuels, and their specific implications on land use and other pressures, and their contribution to the solution of the ... for the period of 2007 to 2010, the Panel established five working groups addressing the issues of decoupling, biofuels, water, metal stocks and flows and environmental impacts. The work of these ... compared to other materials, in view of the comparative size of their flows, only iron, steel and aluminium enter the priority lists. The studies do not agree regarding the issue of construction...