What is ‘hothouse Earth’, and how bad would such a climate catastrophe be?

'Worst case scenario' paper suggests global warming could spiral out of control in coming decades source: http://www.independent.co.uk/environment/hothouse-earth-climate-change-global-warming-greenhouse-gas-sea-level-arctic-ice-a8481086.html #Headlines by: Josh Gabbatiss

Original Post: https://www.independent.co.uk/environment/hothouse-earth-climate-change-global-warming-greenhouse-gas-sea-level-arctic-ice-a8481086.html