1,5 C? Very funny. We shall not stop there for sure.
https://data.giss.nasa.gov/gistemp/maps/index.html2015-20 was 0,29 C above 2005-10
2005-10 was 0,22 C above 1995-2000
1995-2000 was 0,15 C above 1985-95
The picture is clear. By 2030 we will hit 1,5 C and then, sky is the limit.
In 2030 Electricity/heating is still going to be a major Co2 emitter (Chinese, Indian coal, globally natgas). Cars will also be still mostly gas/diesel. Agriculture and industry will change only slowly. So emissions will be not much lower than now.
By 2050 we will be at 1/3-1/5 of emissions as now, but still positive. This means that we will hit 1,5C by 2030 and I guess 1,7-1,9 C by 2050. We might only be slightly above 2 C by 2100.