@mzedp By "enough" I mean the following:
even if we stopped emitting fossil CO2 now worldwide, the planet would quite sure remain in a state not favorable for humans or even keep moving to less favorable states for some time (as indicated by all the weather extremes, jumps in ocean temperature and loss of sea ice this year).
To have a chance (depending on tipping points) of a climate favorable for humans in the long run, at least some of the CO2 has to be removed from the atmosphere.