I hope not, because that means it makes you very fat.
Now, the trouble is that I'm finding it difficult to imagine how an environment can make anyone obese - unless, after some unimaginable disaster, one somehow finds oneself having to eat one's way out of an enormous candyfloss machine:
illustration: By Screenshot taken with WINUAE., Fair use, https://en.wikipedia.org/w/index.php?curid=15080472
or one gets a job biting the holes out of doughnuts.
These eventualities being unlikely, I'm wondering if obesogenic is much more than an excuse for greed. So I think I'll stick with the word fattening, which is a warning, rather than obesogenic, which seems to be a sign of inevitable doom.
Sunday Rest: obesogenic. This word comes from the Latin obēsus, from ob- which means (more or less) lots of, plus edere, to eat.