There is no need to overcomplicate things: a rise in global temperatures of 3.1C is not compatible with human survival. That is where we are heading, unless we act now. On our current path, the world will exceed 1.5C of warming, and could reach a rise of 2.6-3.1C by the end of the century.
For you, today, that might make the difference between wearing a jumper or a jacket. For humanity, it is the difference between survival and extinction. Paris and Berlin will bake under heatwaves. New York will be hit by frequent storm-surges. Coastal towns will be submerged; 800 million people are living on land that will be underwater.
