Mighty Aphrodite's affectionate Greek chorus is
the obvious point of analogy, and so we expect another heavy, forgiving sigh about human foibles, this time in the eternal city, as per Allen's European funding.
CO2 output has a
point of diminishing returns anyway, apparently the common
analogy is painting over a window: the first layer
of paint has a big impact on the amount
of light let through, while each subsequent layer has a less
obvious impact.