Hopefully your family doesn’t have a climate denialist uncle or relative, but if it does, and you’re stuck sitting next to him (or her, if she’s an aunt) at Xmas Lunch, here’s some excellent graphs that you can use to help debunk his (or her) climate denialism (courtesy of NASA).
There are some other really startling graphs and visualisations at the NASA website, so I encourage you to go there.
How it was measured in 1880? With satellite or something?
They asked Santa.