let us simplify the reasoning given--
% of energy consumed by automobiles = (Average energy consumed by each automobile * No. of automobiles) / (Total energy produced)
We are told that this quantity is currently 50%.
However, we are told that efficiency of each car will increase by a factor of 2.
From this the author makes the assumption thatAverage energy consumed by each automobile would also be halved.
this makes the assumption that --
1. The amount of fuel consumed/amount of miles
...
% of energy consumed by automobiles = (Average energy consumed by each automobile * No. of automobiles) / (Total energy produced)
We are told that this quantity is currently 50%.
However, we are told that efficiency of each car will increase by a factor of 2.
From this the author makes the assumption thatAverage energy consumed by each automobile would also be halved.
this makes the assumption that --
1. The amount of fuel consumed/amount of miles
...
