Mixed Signals on Sustainable Development in Brazil?
In the transport sector, ethanol and now bio-diesel use is continuing to grow. Between 2000 and 2006 oil demand was flat despite a nearly 20% increase in both GDP and overall energy demand. Brazil still has a formidable potential for increasing ethanol and bio-diesel production, even as it grapples with the issue of deforestation.
Brazilian ethanol also has a very low CO2 footprint owing to the use of bagasse as a fuel in the ethanol plants, many of which also produce electricity for the local community. But Brazil is also on the verge of becoming a new petro-economy. Offshore discoveries now amount to some 70 billion barrels of oil equivalent. If consumed this will result in emissions of 25 billion tonnes of CO2 or the equivalent of an additional 1-1.5 ppm in atmospheric CO2. In addition, there may be further CO2 emissions after removal from contaminated offshore natural gas.
What solutions lie in Brazil’s future? The first priority is of course to address deforestation, but one option that doesn’t immediately jump out of the page but could be pivotal for Brazil is the application of carbon dioxide capture and storage. Whilst Brazil is a low CO2 economy, CCS could help it remain so whilst letting the country make best use of the resources it has. For example, CCS applied offshore is a potential solution to the CO2 that will be removed from any contaminated natural gas.
Longer term, CCS could be tied in with the nations huge biomass potential (even after deforestation is addressed) to possibly deliver a negative CO2 economy by 2050. Gasification of biomass is a technology gaining ground today. As in the gasification of coal it produces syngas, which can then be used for electricity generation, with a high purity CO2 stream remaining. When sequestered, with biomass as the original feedstock, the process is effectively removing CO2 from the atmosphere. Most biofuel processes (e.g. manufacture of ethanol) also produce bio-CO2 that could be captured and stored. These approaches may be pivotal in the quest for atmospheric stabilisation at safe levels.
So although Brazil has real sustainability challenges ahead, particularly in the area of deforestation and the further expansion of hydroelectricity, it also offers tremendous opportunity for managing emissions on a very large scale. Certainly the willingness is there, you could feel it at the conference. Now that needs to be turned into regulatory action to drive the solutions forward.
