Back in 2020, Microsoft made an ambitious pledge to go carbon negative by 2030. But that plan is encountering some headwinds, according to its latest sustainability report. It showed Microsoft’s carbon emissions have increased by 30% since it made that pledge four years ago and comes a reminder of the significant environmental cost of the AI boom. Just how significant? Marketplace’s Meghan McCarty Carino asked Emma Strubell, a computer science professor at Carnegie Mellon University who co-wrote a paper about the specific energy demands for common uses of this technology.