Known by some as “aboveground oil fields,” biodiesel (made from vegetable oils and fats) and ethanol (made by fermenting the sugars in corn and sugarcane) present the opportunity to grow fuel feedstock on agricultural land—plots that can renew every few years rather than every few million.
Kilalang sa pamamagitan ng ilang bilang " aboveground patlang ng langis, "biodiesel (na ginawa mula sa halaman kuwadro at taba) at ethanol (na ginawa sa pamamagitan ng fermenting ang antas ng asukal sa mais at tubo) naroroon ang pagkakataon na lumaki fuel feedstock sa agrikultura lupa-plots na maaaring i-renew ang bawat ilang taon sa halip na sa bawat ilang milyong.