Guardian: Using biofuels made from corn, sugar cane and soy could have a greater environmental impact than burning fossil fuels, according to experts. Although the fuels themselves emit fewer greenhouse gases, they all have higher costs in terms of biodiversity loss and destruction of farmland. The problems of climate change and the rising cost of oil have led to a race to develop environmentally-friendly biofuels, such as palm oil or ethanol derived from corn and sugar cane. The EU has …