请问2100年有没有什么碳排放的既定目标？

问题如下：

For a reasonable chance of limiting the global average temperature rise to 1.5°C (2.7°F), the Intergovernmental Panel on Climate Change (IPCC) recommends that global emissions of CO2 must reach “net zero” around:

选项：

A.2050 B.2030 C.2100

解释：

A is correct. According to the IPCC, reaching “net zero” emissions by 2050 is required if we are to limit the global temperature rise to 1.5°C (2.7°F).