What is responsible for the grass scent that freshly harvested cannabis shares with lawn cuttings? And whether chlorophyll is responsible for the smell or not, isn't it one of the things eaten by bacteria during curing?
The scent we pick up we are hyper sensitive, grossly disproportionately to the smell and all day long everywhere in many many different forms. Human defence and protection adaptation has made humans very sensitive to a variety of compounds and human noses pick up on minute trace amounts either from predators, food source animals, dead flesh and decomposition or people covered with its scent.
The herb industry had done a great amount of research into preserving flavor and aroma of both fresh and dried herbs to extend shelf life and usable time period. If you have any green herbs in your cupboards very old the colour fades, and yes also oils flavonoids excetera that is the chlorophyll degrading.
Broccoli has more chlorophyll than cannabis, the deep green broccoli colour would indicate a nitrogen toxicity in a cannabis plant
No not bacteria. If bacteria were digesting anything it would become as spoiled fruit or vegetable with the mushy slimy exudate runoff from decomposition and be quite harmful to ingest the bacteria . This is why we have food handling safety regulations and inspection agency's to prevent food poisonings.
The actual scent of chlorophyll degrading is a light semi sweet sugar alcohol fume you would recognize from a active compost pile.