First generation liquid biofuels: Fluctuating oil prices and growing concerns about climate change have led to a renewed commitment to renewable energy – mainly from industrialised countries – aimed at expanding the production and use of first generation liquid biofuels from crops such as oil palm, sugarcane, soybean and jatropha for transportation usage. Many countries have now established targets for incorporating biofuels into the supply of transport fuel. For example, the European Union's Renewable Energy Directive (EU RED), adopted in 2009, mandates each member state to ensure that at least 10 percent of fuel consumed in its transport sector is derived from renewable sources – including biofuels – by 2020.1
Forests are both positively and negatively impacted by liquid biofuel expansion. Liquid biofuels have been promoted as a source of renewable energy that also makes contributions to energy security, rural development and greenhouse gas (GHG) emissions reduction when compared to fossil-derived fuels. However, because first generation biofuels are made from the sugars and vegetable oils found in arable crops, expansion of these feedstock crops can have negative impacts on forests due to direct and indirect land use change.2
Carbon debt: Land use change for biofuel crop plantations can have many environmental and social implications. A recent CIFOR study showed that if the full lifecycle of GHG emissions is taken into consideration, carbon emissions generated from land conversion for biofuel feedstocks may take years or even centuries to reverse through substitution of fossil fuels with biofuels.3 Furthermore, biofuel feedstock cultivation can lead to a loss of land rights and labour opportunities for local communities, as well as threats to food security, which have deleterious impacts on customary land users.
To combat these impacts, some markets such as the European Commission (EC) have established a set of sustainability criteria to which producers must comply for biofuels to contribute towards the 2020 target. In July 2011, the EC approved the first seven 'voluntary schemes', which may be used by biofuel feedstock producers and processors to certify that their operations are in compliance with the EU RED sustainability criteria. These address environmental criteria, but are yet to incorporate social sustainability components.4
Second-generation biofuels: As the global demand for energy increases in the future, different sources of forest biomass may play a vital role in providing a more stable energy future. Second generation biofuels are those made from woody crops, agricultural residues or waste, which makes it harder to extract the required fuel compared to those produced from arable crops. However, scientists believe the development of second generation bioenergy is on the horizon, though a product is not yet on the market.5 Like its first generation counterpart, second generation bioenergy may also pose pressures on the land system due to increased demand for dedicated bioenergy crops with potentially serious impacts on forests not classified as protected areas.6
2 Havlík, P., Schneider, U.A., Schmid, E., Böttcher, H., Fritz, S., SkalskyÏ, R., Aoko, K., de Cara, S., Kindermann, G. et al. 2010 Global land use implications of first and second generation biofuel targets. Energy Policy doi.org/10.1016/j. enpol.2010.03.030; Fischer, G., Hizsnyik, E., Prieler, S., Shah, M. and van Velthuizen, H. 2009. Biofuels and food security. IIASA, OFID. Vienna, Austria.
3 Achten, W. and Verchot, L. 2011 Implications of biodiesel-induced land-use changes for CO2 emissions: case studies in tropical America, Africa, and Southeast Asia. Ecology and Society 16(4): 14 dx.doi.org/10.5751/ES-04403-160414
5 Eisentraut, A. 2010 Sustainable production of second generation biofuels: potential and perspectives in major economies and developing countries. International Energy Agency, Paris, France.
6 Popp, A., Krause, M., Dietrich, J. P., Lotze-Campen, H., Leimbach, M., Beringer, T. and Bauer, N. 2012 Additional CO2
emissions from land use change – forest conservation as a precondition for sustainable production of second generation
bioenergy. In: Ecological Economics 74:64-70.