In America
The energy from solar on about 1 million acres of farmland would equal the energy available from the ethanol derived from 30 billion acres of corn.
Surprising?
Not very. How inefficient the whole corn for ethanol process is. Factor in the water, pesticides, and fertilizers needed to grow 30 billion acres of corn and you begin to get an idea about how much of a waste of resources corn for ethanol schemes for petrol are.
The same on a limited scale must apply to the UK.