That is how much hotter the world runs than the one your grandparents were born into. This page measures what a single degree looks like — in stripes, in carbon, in ice — using an illustrative dataset shaped like the real one.
Each band is one year. Hover them — the cold blues of the early 1900s give way, stripe by stripe, to the reds of now.
Atmospheric CO₂, by decade, in parts per million. The last step is the one taken at a run.
Three receipts, paid in physics.