Transforming food into fuels is a monstrosity.
Regardless of numerous official statements assuring that this is not a choice between food and fuel, reality shows that this, and no other, is exactly the alternative: either the land is used to produce food or to produce biofuels.
Read the whole thing. His basic point is that the more land used to grow biofuel stock, the less land is available to grow food. Worse, most of such growing will be done in third world countries, making the lives of the desperately poor and hungry even worse.
It is not true that biofuels are a renewable and constant energy source, given that the crucial factor in plant growth is not sunlight but the availability of water and suitable soil conditions. If this were not the case, we would be able to grow corn or sugarcane in the Sahara Desert. The effects of large-scale production of biofuels will be devastating.
It is not true that they do not pollute. Even if ethanol produces less carbon emissions, the process to obtain it pollutes the surface and the water with nitrates, herbicides, pesticides and waste, and the air is polluted with aldehydes and alcohols that are carcinogens. The presumption of a “green and clean” fuel is a fallacy.
That some may go hungry so others more wealthy can drive their cars using ethanol is an abomination. Yes, we need renewable energy, but as Castro points out, ethanol from foodstocks is not renewable. Nor is it equitable or fair.