The IPCC SAR Summary for Policymakers noted that «
the choice of abatement paths involves balancing the economic risks of rapid abatement now (that premature capital stock retirement will later be proved unnecessary) against the corresponding risk of delay (that more rapid reduction will then be required, necessitating premature retirement of future capital stock).»
One additional large cost to CO2
abatement will be the loss
of freedoms we experience, from the small (reduced
choice in cars) to the problematic (limits on airplane flights) to the real hardships (limits on children).