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Australia contributes 1% of the world's greenhouse gas emissions. How could that create climate change? The earth is 4.7 Billion years old and the climate has been changing all that time. There is precious little that man can do to stop it.
Greg, Country boundaries are man made. It doesn't matter how much pollution an individual makes, it is the gross total that affects us.
So Trumps 30 % is divided among us all.
All it means is that he is killing everyone else faster.
The USA and China are like having chain smokers, on Capstan Full Strength, in a closed cabin with a bunch of non smokers.
They are killing everyone, as well as themselves.