EXPLAINER Climate Last week Australia dropped its bid to co-host the 31st United Nations COP. In technical terms, it’s the United Nations Framework Convention on Climate Change (UNFCCC) Conference of the Parties (COP). In less technical terms, it’s the world’s biggest meeting to discuss and agree on future climate action. Why did Australia, which is the world’s second-largest exporter of fossil fuels by emissions, want to host a conference about climate change?