We're fortunate enough to live on a planet that's bathed in thousands of times more energy than we use and that's stocked with thousands of times more water, raw materials, and even food-growing potential than we need.

AI does not keep me up at night. Almost no one is working on conscious machines. Deep learning algorithms, or Google search, or Facebook personalization, or Siri or self driving cars or Watson, those have the same relationship to conscious machines as a toaster does to a chess-playing computer.

Neural implants could accomplish things no external interface could: Virtual and augmented reality with all five senses; augmentation of human memory, attention, and learning speed; even multi-sense telepathy - sharing what we see, hear, touch, and even perhaps what we think and feel with others.

Everything good and bad about technology would be magnified by implanting it deep in brains. Is the risk of brain-hacking outweighed by the societal benefits of faster, deeper communication, and the ability to augment our own intelligence?

As an explorer, I know firsthand there are many places in the ocean so full of life that they should be protected. Coral reefs and mangrove coastlines are stressed already by climate change and ocean acidification, and poor planning will just make their plight worse.

All the conservation efforts in the world won't be enough to make a dent in the oncoming sustainability crisis our planet faces.

If we don't succeed on the climate change agenda, we risk getting feedbacks that undermine everything else.

Actually creating a positive school climate, particularly in schools that are in communities that are themselves not calm and orderly, is hard work.