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? Zoe Thomas hosts the final episode in Tech News Briefing’s special series looking into new climate technologies. Learn more about your ad choices. Visit megaphone.fm/adchoices