Climate change is accelerating, with carbon dioxide levels increasing, sea levels rising and ice sheets melting faster than ever, experts have warned.
The warning from the World Meteorological Organisation forms part of a "united in science" review for a UN climate action summit at which countries are being urged to increase their ambition to tackle emissions.
The WMO has published a report showing climate change and its impacts over the past five years between 2015 and 2019, which shows it was the hottest five-year period on record.
The world has warmed by 1.1C since pre-industrial times, and by 0.2C just compared to the previous five year period 2011-2015, the report showed.
