There are many unresolved and difficult issues in the area of climate policy, but in economics there is a fairly broad consensus on the principles for solving the problem. These principles are discussed also by Jean Tirole in his book ‘Economics for the Common Good’. Climate policy should be effective and equitable.
4  paper,  “Central  bank  lessons  from  the  global  crisis.”  BIS central bankers’ speeches  moral hazard argument is easy to deploy, the public sector may shy away from acting as lender of last resort except in extremis. Hence the phenomenon of too big to fail.