The UN's World Meteorological Organisation says carbon dioxide levels are rising faster than predicted and it's urging more action to avoid an intense climate crisis in the coming years.
In Switzerland...the atmosphere close to the ground has warmed by around two degrees Celsius since measurements began in 1864.
Mathias Huss, who heads glacier monitoring institute GLAMOS, says more than 500 glaciers have disappeared.
Mr Huss estimates that 90 percent of the 1,500 glaciers remaining will be gone by the end of the century if nothing is done to cut emissions.
According to a new report by the World Meteorological Organisation, since 1990, greenhouse gases have caused a 43 per cent increase in total radiative forcing - the main driver of climate change.
Secretary-General of the WMO, Petteri Taalas, says CO2 is responsible for roughly two-thirds of Earth's warming and is now at record high levels.
“We have again broken records in carbon dioxide concentrations and we have already exceeded 400ppm level which was regarded as a critical level. That happened already two years ago and this growth of carbon dioxide concentration continues,” Mr Taalas said.
In an appeal to world leaders to do more to reverse countries' reliance on producing energy from fossil fuels...Mr Taalas warned that global efforts were vital.
