The Atlantic has
“Some of the worst impacts of climate change can still be avoided. “There are still emissions pathways that would lead us to limiting warming to 1.5 degrees, but they require deep, rapid cuts in greenhouse-gas emissions,” Flato said. “That leaves a glimmer of optimism that we could limit warming to levels like that.” But it would require much more expedient action from the United States than is contemplated in, say, the bipartisan infrastructure bill that Congress is currently considering.
Notice the lack of specifics on what “deep’rapid cuts” could mean.