I think we’ve all got to recognize that all of our energy sources and potential energy sources have impacts. The question is how bad, and whether they are worth it, and how we can responsibly mitigate and minimize these impacts. If you’re waiting for the perfect, zero-impact solution, you’ll be waiting a long time. We’d better take the threat of invasive biofuel feedstock species getting out of control seriously, but it shouldn’t be considered a reason to abandon non-food based biofuels, full stop. I’d hate to see the Everglades overrun by giant reeds (as the article raises the specter of), just like I’d hate to see a geothermal power plant in Yellowstone National Park (even though there’s geothermal potential there for sure). It’s about responsible siting and development of renewable energy sources with a focus on mitigating impacts, whether it’s potential for invasive biofuel species running amok or wind turbines killing birds. Both can easily be mitigated, minimized or entirely avoided with a little forethought and planning.