How do you create references for journal articles in APA format? If you need to write a psychology paper, then you are going to probably need to reference a number of different journal articles. Such articles summarize the results of studies and experiments conducted by researchers on an enormous range of topics.
The problem that second generation biofuel processes are addressing is to extract useful feedstocks from this woody or fibrous biomass, where the useful sugars are locked in by lignin, hemicellulose and cellulose. All plants contain lignin, hemicellulose and cellulose.
Unfortunately, Brazil is clear-cutting almost a million acres of tropical forest per year to produce biofuel from these crops, and shipping much of the fuel all the way to Europe. The net effect is about 50% more carbon emitted by using these biofuels than using petroleum fuels (Eric Holt-GimÃ©nez, The Politics of Food).