I know some amazing portals in Polish.
One about climate: https://naukaoklimacie.pl/
Another about "nature" in general (probably "environment" would be a more fitting translation here). I even wrote an article for them at the end of my Master's (they had it go through a senior researcher later to check the quality) ^‿^ https://naukadlaprzyrody.pl/
On both of the abovementioned portals you get scientists writing pop-science, answering questions, debunking myths, etc.
We also have "SmogLab" that used to focus just on smog issues, now is overall environmental. But I think for people from outside of Poland, especially coming from places with relatively good air quality (e.g. Scandinavia, but in this comparison, even all of Western Europe), the smog part might be especially interesting: It became a bit more of a news portal, though. https://smoglab.pl/smog/