As a result of rising concentrations of greenhouse gases in the atmosphere, global average temperatures are already about 1C above pre-industrial levels.
On present trends, this could reach around 1.5C in a decade /2030/ and 2C half a decade later /2035/.
At that point, warn climate scientists, dangerous and irreversible tipping points in the climate are likely to be passed.
As the IMF notes: “Sizeable and rapid reductions in carbon emissions are needed for this goal to be met; specifically, net carbon emissions need to decline to zero by mid-century /2050/.
Martin Wolf FT 3 November 2020