Emissions reductions are back in the global spotlight with the latest Conference of the Parties - COP27 - underway in Egypt.  

Every year the climate summit brings the world together to set targets for reducing greenhouse gas emissions. 

But when everyone heads back home, how do countries actually report their performance? 

Dr Sophie Calabretto talks to Cosmos Magazine journalist Ellen Phiddian about how we count greenhouse gas emissions and how some are wildly underreporting what they emit.

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