Something has to change in the world. Without change, young people will have no future.

I've become interested in the impact of climate change on the world and the future of energy needs for the developing world.

As Development Secretary, I have seen in the developing world that climate change there is not a theory, is not a future threat: it is a contemporary crisis.

I'm interested in things that change the world or that affect the future and wondrous, new technology where you see it, and you're like, 'Wow, how did that even happen? How is that possible?'

Exploring and colonizing Mars can bring us new scientific understanding of climate change, of how planet-wide processes can make a warm and wet world into a barren landscape. By exploring and understanding Mars, we may gain key insights into the past and future of our own world.

Changing anything in the past, if you believe it's possible, could alter the entire future of the world, including my own birth, so I'd change nothing. Not a thing. As for the future... I think I'd like to see how it all ends, which is probably why I write about the future apocalypse so frequently.

Globalization and technical change are the guarantee of our future prosperity. And reversing on that will not only make things worse, but it will make things worse for a very large number of people around the world who have benefitted - people in China and India who have been dragged out of the most awful poverty.

For 25 years countless people have come to the U.N. climate conferences begging our world leaders to stop emissions and clearly that has not worked as emissions are continuing to rise. So I will not beg the world leaders to care for our future. I will instead let them know change is coming whether they like it or not.

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