The climate policy issue is in a state where different visions or prop
osals compete with one another in the political arena. The success of
such a vision or proposal largely depends on the success of its propon
ents in persuading the public or a yet undecided ultimate authority of
its merits. This essay identifies a discounting related ambiguity in
cost-benefit analyses of climate change, making two competing visions
and proposals ''legitimate.'' By placing the induced opportunity for g
reenhouse policy persuasion in a political economy context, it is show
n how visionaries and lobbyists can exploit human time preferences for
the purpose of greenhouse policy persuasion.