If Australia cut off Co2, will it make any difference to the earth? NO. Will it make difference to ordinary life, Absolutely and you have to fork $1000 a year for normal family. Why should we go ahead of the big poluters? I thought the worst should act first and we do accordingly.
Maybe we should be part of the solution instead of part of the problem if we would like other, much less wealthy, countries to do the same. The cost to do so is pretty small after all.