The law of unintended consequences strikes the environment

As the world has become obsessed with bio-fuels, we forgot that in order to produce it we have to both take resources away from food production and accelerate deforestation to grow the crops. This results in a rising cost of food, and greater carbon emissions fron deforestation - as well the the potential extinction of species of animals, birds, and plants. This is likely to prove as destructive, in a different way, as fossil fuels.