> the sudden ignition of underground oil at the Yucatán impact site could have jetted into the upper atmosphere a mass of fine black carbon, also known as soot ... black carbon injected into the stratosphere would ... [act] as a long-lived sunshade that could abruptly cool Earth and inhibit photosynthesis over a period of years

Read the last 4 of the 9 total paragraphs if you want a TL;DR.

That's not even where the summary begins, that's where the actual content starts. So many things are like a TV show where every episode consists mostly of "previously on" :/

You could skip down to the paragraph beginning “Now, a paper just published in Scientific Reports…”

It’s only waffle if you know it already!