There is a live question about whether global warming will cause an oxygen shortage. I remember writing a (controversial because of original research) answer to a question about how long atmospheric oxygen would ask if photosynthesis stopped. It contained some relevant references to the live que...

A question like this seems to me to be clearly off-topic, because, although it does reference an algorithm, it appears to only be asking if someone has already coded it. However, my reading of https://cs.stackexchange.com/help/on-topic does not clearly articulate why the question is off topic. ...

Is there a method to search past comments only. I'm interested in a comment I read years ago that was not specific to the question or answers, so it wouldn't be in the normal search. Keywords: proportion, proportionality, proportional.