As of the time of writing, late 2014, Wikipedia
some 196 sovereign states in the world.
Of these it seems that there are four which may not have signed or ratified the UN Framework Convention on Climate Change
Below are the countries whose governments seemed not to have signed or ratified the UNFCCC.
- Vatican City
The governments of all the other nations, about 192 of them, have, by signing
and ratifying the UNFCCC, accepted the fact of anthropogenic climate change.
I am Australian.
The Australian government (of 2014) was notoriously pro-coal and against taking action on climate change, yet even it accepts the reality of ACC.
(The later Turnbull and Morrison governments were also accepting of the reality of ACC at the same time as being shamefully supportive of fossil fuels and opposed to renewable energy.)
Also see Why accept climate science?