It's also the people he talks to. From the Acknowledgements of his latest book : "Jabe Blumenthal and Karen Fries are the two former Microsoft colleagues who

It's also the people he talks to. From the Acknowledgements of his latest book : "Jabe Blumenthal and Karen Fries are the two former Microsoft colleagues who organized my first learning session on climate change in 2006. In that session, they introduced me to two climate scientists, Ken Caldeira—then at the Carnegie Institution for Science—and David Keith of the Harvard University Center for the Environment. Since then, I’ve had countless conversations with Ken and David that have shaped my thinking. Ken and a team of his postdoctoral fellows—Candise Henry, Rebecca Peer, and Tyler Ruggles—pored over the manuscript line by line to check for factual mistakes. I’m thankful for their meticulous work. Any remaining errors are my responsibility. The late David MacKay of Cambridge University inspired me with his wit and insights. I recommend his phenomenal book Sustainable Energy—Without the Hot Air to anyone who wants to dig deeper into the subject of energy and climate change. Jabe Blumenthal and Karen Fries are the two former Microsoft colleagues who organized my first learning session on climate change in 2006. In that session, they introduced me to two climate scientists, Ken Caldeira—then at the Carnegie Institution for Science—and David Keith of the Harvard University Center for the Environment. Since then, I’ve had countless conversations with Ken and David that have shaped my thinking. Ken and a team of his postdoctoral fellows—Candise Henry, Rebecca Peer, and Tyler Ruggles—pored over the manuscript line by line to check for factual mistakes. I’m thankful for their meticulous work. Any remaining errors are my responsibility. The late David MacKay of Cambridge University inspired me with his wit and insights. I recommend his phenomenal book Sustainable Energy—Without the Hot Air to anyone who wants to dig deeper into the subject of energy and climate change."