Cipher is a publication supported by Breakthrough Energy. Cipher’s mission is to help accelerate understanding of the technological transformations required to get to net-zero greenhouse gas emissions by 2050 through expert reporting and analysis. Cipher means zero, which we find intriguing because our goal is simple, but hard. Going from the 51 billion tons of greenhouse gases we emit a year today to zero by 2050. Cipher also means code. We aim to decode complex topics and make them clear to people at all levels working to solve the climate crisis — and anyone who wants to be an informed, concerned citizen. We are currently publishing a weekly newsletter Wednesday mornings U.S. Eastern Time, and plan to expand.

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