Unless you invent a time machine, or as postulated by OP, some magic sequestration technology to pull CO2 out of the atmosphere and put it back in the ground, it's too late.
It's like we're in a car that's driven over a cliff, and you're saying "Well, we're still here, as long as we invent a way for this car to fly in the next 15 seconds before impact, then we'll be okay"
No we can't, because most of the CO2 has already been emitted: https://www.carbonbrief.org/analysis-four-years-left-one-poi...
Unless you invent a time machine, or as postulated by OP, some magic sequestration technology to pull CO2 out of the atmosphere and put it back in the ground, it's too late.
It's like we're in a car that's driven over a cliff, and you're saying "Well, we're still here, as long as we invent a way for this car to fly in the next 15 seconds before impact, then we'll be okay"