- Paris Climate Talks
Top U.S. Scientist: World Must Act Now to Reverse Climate Change
“The world needs ultimately to completely decarbonize,” says John Holdren, Obama’s science advisor. Here’s what he says about why we need to do it—and whether we can.
LE BOURGET, FranceAs global leaders open their final week of negotiations, the White House's top scientist spoke with National Geographic to offer his thoughts on why it's urgent for countries to tackle the climate crisis now—and why he's optimistic about the future for his grandchildren.
Here's our conversation with John Holdren, President Obama’s science and technology advisor. It has been lightly edited and condensed. (Read more about climate change.)
One of my own fields for many decades now has been the causes, consequences, and remedies of climate change. So I am here, in part, so that if questions arise in negotiations that depend on details of science, I can provide those details.
But I am also here amplifying the Obama Administration’s messages about why