"We have converted huge swaths of land and ocean into human habitats where we live and grow food and harvest energy. But there's been a sea change in the past century."

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Mac [Barnett ] and I have been friends for more than ten years. We met working at an educational nonprofit. And we have been pranking each other the whole time. It's our own version of a prank war. We thought we would channel some of that energy into writing a book.

— Jory John