Gas 2.0 profiles seven weeds that can also be used to create biofuel. They need little help to grow, thus costs are low, and they can thrive in contaminated soil. Most are highly invasive, so they could be harvested from areas where they’ve already invaded. Like kudzu, “the plant that ate the south”
To offset the expense of harvesting kudzu from the steep hillsides that it favors, researchers point out that there are no costs for fertilizing, irrigating, or planting the invader.