Climate change and global warming have many variables affecting the atmospheric temperature rise in decades to come. Which variables have the most effect? Which don’t have long term effects? What temperature change is advised by scientists?
This chart by Climate Analytics shows the recent 30 yr history as a black line. Projections of temperature rise using different policies and scenarios are labeled in colors at the right. If we proceed with no changes in government policies or human behavior, the projected baseline warming is at least 4.1 C˚ (7.4 F˚).
Limiting warming to 1.5°C (2.7 F˚) above pre-industrial levels by 2100 means that the emissions of greenhouse gases need to be reduced rapidly in the coming years and decades, and brought to zero around mid-century. See the IPCC report.
Current Policies put the world on-track for about 2.7 C˚ of warming by the end of the century. Clearly, this is a huge international challenge requiring concerted efforts and cooperation. To do nothing is not acceptable. Future generations depend on our action now.

© 2009-2020 by Climate Analytics and NewClimate Institute
This screenshot image is from a recently published simulator tool of temperature change. Using the tool, the user can vary such factors as type of energy supply, efficiency of vehicles and buildings, use of electric vehicles, population and economic growth, land use, and carbon removal. The link to the simulator is here. User guide link is here. A short video tutorial link is here.
Try your own scenarios. See what changes will make positive or negative results.