The US is counting on technological solutions, such as the development of low-emission and carbon-scrubbing technologies, and an acceleration of R & D for new energy sources. At the same time, it is pursuing increased energy efficiency and proposing an emission reduction regime based on "energy density" (the quantity of greenhouse gas emissions per unit of GDP).
美國打的算盤是，一方面以科技解決，例如發展低碳、碳捕捉科技，及加速新能源的研發，另一方面則從提升能源效率著手，並提出以「能源密集度」（每單位 GDP 的溫室氣體排放量）為指標的減量機制。