The energy returns have been
calculated in a number of different ways, but most sources show an energy balance more favorable than that of most liquid fuels.
Not exact matches
Applying the Definitions
In general,
different ways to
calculate the
number of dimensions give
different numbers, because they probe
different aspects
of the geometry.
This let them crunch the
numbers in a new
way, and —
in addition to
calculating a single estimate — determine the statistical probability
of different events, such as the population leveling off.
With all the many
different ways of calculating these
numbers (empirically and from simple models and general circulation models), and
different results that have been obtained from these analyses, why hasn't this range and central value budged
in over 3 decades?