I'm reading this post and right at the start I'm doubting if they understand what they are talking about:
> Now let's take a closer look at this reference point of the measurement, which is to limit the increase of the global average temperature to 1.5°C by 2050 from that of the 1850-1900 era. Firstly, the industrialization of the world didn’t start in the 1850s uniformly across the world. [...] Secondly, the global population was 1.2 billion in 1850 and it is projected to reach 9.7 billion by 2050. [...] Is this a right reference to compare global average temperature? If they want to use a fair reference point they should project what would be the global average temperature in pre-industrial time if the population was 9.7 billion and then after 200 years of industrialization measure the increase.
This line of thinking makes no sense. The effects of a specific increase in global warming are the same, no matter if the population is 5 billion or 50 billion, or if everyone pollutes or only 10% of the people pollute.