Well, it ain't biofuel.
Biofuels are killing the planet. Deforestation of Malaysia and the Amazon, rising food prices, decreasing wheat stores, decreasing availability of other displaced crops, and astronomical carbon emissions associated with the production of biofuels are disproving the myth that they'll be an efficient replacement for gasoline.
Check out these 3 articles (I guarantee there will be more to come...):
If we want to save the planet, we need a five-year freeze on biofuels
Demand for Ethanol May Drive Up Food Prices
Palm oil deemed biofuel failure
Apparently rising corn prices are expected to make a big impact in the prices of meats, eggs, and cheeses, since farmers don't get a $1.00 subsidy for crops going to feed livestock. Similarly, the farmers are not getting anything nearly so nice in subsidies for other food crops, so why grow them? Those that are still being grown will officially become rare, which means they'll be more expensive, too. If, however the gov't decides to subsidize other crops at a higher rate, where will they be planted? Virgin land.
The Indonesians are setting up farms for biofuel materials at a fever pace, and are burning off rainforest land at a rate of 0.7% per year, with the expectation that there will be no more Malaysian rainforests by 2022. That will mean the end of the orangutan in the wild. Nice. That same deforestation is releasing 1.4Billion tons of carbon emissions through fires every year, and the subsequent conversion of biofuel crops is releasing another 600 million tons, for a collective total of 2 billion tons / year, or roughly 8% of the ENTIRE WORLD'S EMISSIONS.
Even better: that same conversion of crops generates 10x more emissions than converting petroleum to diesel.
And best of all: every tank of E10 fuel you put in your car in the US will get you 3% worse fuel economy than gasoline purchased just a couple of years ago. And somehow we're supposed to rally behind E10 as helping reduce our dependency on foreign oil. Dude: if it's less efficient, you're going to need more of it. And just to add a little cherry on top, we're supposed to be moving to E20 before too long, with a guaranteed additional 3% drop in fuel economy. Sweet...