In order to limit the rise in global temperature to 1.5 degrees Celsius over pre-industrial levels, the IPCC indicates that the world has to reduce the emission of greenhouse gases to the extent of what percent by the year 2030?

To hold warming to 1.5 degrees Celsius, the IPCC says emissions must fall by about 45 percent by 2030.

This reduction is measured against 2010 emission levels.

A figure of 65 percent overstates the 2030 reduction the IPCC specifies.

A figure of 50 percent is higher than the stated 45 percent target.

A figure of 40 percent falls short of the required cut.

The IPCC also calls for reaching net-zero carbon dioxide emissions by around 2050.