"But communication is two-sided - vital and profound communication makes demands also on those who are to receive it... demands in the sense of concentration, of genuine effort to receive what is being communicated."

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If the relatively rich participating countries want to stabilize atmospheric concentrations of greenhouse gases, they will have to pay at least some poor countries to reduce their emissions. Achievement of substantial reduction in this way implies international transfers of wealth on a scale well beyond anything in recorded history. There is no effective political support for such a Herculean effort, particularly in the United States.

— Henry Sylvester Jacoby