US farmers are growing the first corn plants genetically modified for the specific purpose of putting more ethanol in gas tanks rather than producing more food. Aid organisations warn the new GM corn could worsen a global food crisis exposed by the famine in Somalia by diverting more corn into energy production.

The food industry also opposes the new GM product because, although not inedible, it is unsuitable for use in the manufacture of food products that commonly use corn. Farmers growing corn for human consumption are also concerned about cross-contamination. The corn, developed by a branch of the Swiss pesticide firm Syngenta, contains an added gene for an enzyme (amylase) that speeds the breakdown of starches into ethanol. Ethanol plants normally have to add the enzyme to corn when making ethanol.

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10 unconventional sources of biofuel

Biofuels are fuels produced from organic material, as different from fossil fuels such as petroleum or coal. The fossil fuels are non-renewable. In particular, petroleum on which the entire transportation industry is based, is expected to run out within next 30 years. There are stepped up efforts round the world to find alternative energy sources. Biofuels, as a renewable energy source, has made some headway, meeting some 2.7 percent of the global energy usage in 2010. This is projected to rise to 25 percent by the year 2050.

Biofuels can be broadly classified in three categories solid, liquid, and gas. Of these, the liquid form is getting the most attention due to the possibility of substitution for petroleum usage in transport vehicles. The next in important alternative source of energy is the bio gas and then the solid form. The developments in all three forms, holds the promise of biofuels emerging as an alternative energy source, in the coming years.

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5 Companies Making Fuel From Algae Now

Ubiquitous and easy to grow, algae has long been a promising biomass-to-fuel candidate in the eyes of researchers. Now algae is a burgeoning sector in biofuels with several high-profile start-ups, including Craig Venter’s Synthetic Genomics, and the interest of big-time investors like Bill Gates and ExxonMobil. Of course, hurdles still exist to make a competitive fuel. Algal biofuels still cost too much to produce—over $8 a gallon (pdf), according to the DOE. Furthermore, most existing strains do not yield oil in the quantities needed to quickly scale up to commercial production of biofuels. Companies also need to worry about contaminating local ecosystems and the amount of water needed to grow cultures in large batches. Despite these challenges inroads—and actual fuel—are being made in the nascent field. Here are 5 projects leading the pack today.

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The desert plants used to distil tequila could cut emissions from transport by providing an important new biofuel crop, according to new research.

“Agave has a huge advantage, as it can grow in marginal or desert land, not on arable land,” and therefore would not displace food crops, said Oliver Inderwildi, at the University of Oxford.

Much of the ethanol used as a substitute for petrol is currently produced from corn, especially in the US, and has been criticised for driving up grain prices to record levels. A recent inquiry found that laws mandating the addition of biofuels to petrol and diesel had backfired badly and were unethical because biofuel production often violated human rights and damaged the environment.

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