Final answer:
To replace the energy needs of the planet with biodiesel from Soy Beans, we would need a significant percentage of the Earth's surface.
Step-by-step explanation:
In order to replace the energy needs of the planet with biodiesel from Soy Beans, we would need to commandeer a substantial percentage of the Earth's surface.
The total biological scale on the planet is estimated to be 100 TW, which is not enough to offer a substitute for our current fossil fuel appetite. Even if we tried to use all biology on Earth, it would not be sufficient.
Therefore, it is difficult to estimate the exact percentage of the Earth's surface that would be needed, but it would likely be a significant amount.