Similarly, if global warming triggers the spread of malaria northward, then efforts to abate climate change by reducing greenhouse gases will require the engagement of the U.S. president.

• 同理，如果全球暖化引发了疟疾的北向传播，那麽就需要美国总统的允诺，致力减少温室气体的排放，以减轻气候的变化。