It’s nice to get some good news on the environmental front every once in a while – so I was pleased to see Worldchanging mention a report that says renewable energy sources are becoming cost-competitive with fossil fuels in the United States. As with all changes though, there are consequences to consider. Futurismic’s columnist Jamais Cascio is also pleased to see renewables taking up the strain, but warns that we should consider the potential consequences of a reduced demand for oil in the politically unstable OPEC nations.