Complex sentence: In 2012, Sovacool was invited by the Intergovernmental Panel on Climate Change (IPCC) to be a contributing author to its Working Group II, which deals with climate change mitigation, to work on the forthcoming Fifth Assessment chapter "Rural Poverty and Livelihoods".
Split into simpler sentences: In 2012, Sovacool was invited by the Intergovernmental Panel on Climate Change (IPCC) to be a contributing author to its Working Group II, which deals with climate change mitigation. He is a Contributing Author to the Intergovernmental Panel on Climate Change's (IPCC) forthcoming Fifth Assessment (AR5) on "Rural Poverty and Livelihoods".