The market for carbon credits has some big problems. The certificates that allow companies and governments to offset their emissions have been shown in some cases to be unreliable.

Crypto enthusiasts think using the same blockchain tech that makes digital currencies traceable could be the solution. But are startups like Moss Earth addressing the most pressing issues?

The Wall Street Journal’s Zoe Thomas hosts this special episode of WSJ Tech News Briefing looking into new climate technologies.

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