Urgent global action needed to stop drastic climate change trend: IPCC report author

Human-caused climate crisis is "unequivocal" and temperatures are likely to rise by more than 1.5 degrees Celsius over the next 20 years, a report by the Intergovernmental Panel on Climate Change (IPCC) warns.

Xinhua talks to one of its authors on how dire the situation is and what should be done.