So scientists often look to this so-called Pliocene warm period for hints about our future climate.

因此科学家们经常在所谓上新世暖温期中寻找有关未来气候的线索。

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Fixing our economy, transforming our energy future, slowing and ultimately reversing climate change and its consequences will require a clear agenda and aggressive timetable that will allow us to repower, refuel and rebuild America.

CNN: Commentary: It's still the right time to combat global warming

But for the sake of our children and our future, we must do more to combat climate change.

WHITEHOUSE: State of the Union 2013

One of those challenges is building on the work that we've done to control our own energy future while reducing pollution that contributes to climate change.

WHITEHOUSE: Remarks by the President in Personnel Announcements