I will never believe in some local media that sometimes they only seek attention and increase their existence by presenting some news that is only based on the "assumptions" of some people who are not even experts and without detailed, concrete and accountable evidentiary data.
I don't think crypto mining is the main problem that causes air pollution in Jakarta, from the media you've read they most likely don't provide accurate and complete data, right?. If you are someone who lives in Jakarta, surely you will understand that Jakarta is too crowded and there are too many private vehicles and many industries that contribute to air pollution. Carbon emissions from private vehicles and transportation, several large industries and the burning of coal as a source of electricity generation are the causes that contribute most to air pollution there.
Local media is not a place to get the news for sure, it's a lot more important to get it with proof on social media. Of course the downside for both of them would be getting to the bottom of the source and proof, because if someone says "X happened today", then you do not know if you should trust them or not, but if you look for the source and find proof that indeed X happened, then you could feel better and online is the way to go, because local media doesn't have a source for you to look into, but online does.
This is true even for wikipedia, there could be something wrong in wikipedia too, it's just people and nothing more, which is why I think it should be quite important to make it work somehow and find the source.