On every page of xkcd there is featured a list of recommended xkcd comics.
This one (
archive), "A Timeline of Earth's Average Temperature", is the most noticable. Here is an edit, showing the part that's actually relevant.
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Notice that the "current path" temperature projection shows an increase of about 4.5° Celsius by 2100.
That isn't actually the current projection for global warming. That was the worst case global warming scenario from about a decade ago, RCP8.5. If current energy use trends continue, the world is headed for the "optimistic scenario" of an increase of about 2.5° Celsius by 2100.
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And
here is the link (
archive).
It's pretty irresponsible for Randall Munroe to not show the current science.