Stench in Swamps

One thing which would make minecraft so much better would be a smell from swamps which only happens further into a swamp not the outside border. 

This stench that you get in the swamps would be seen like fog but green. Staying in contact with the fog for to long will give you a poison effect similar to eating raw meat and lasts for about 30 seconds the same length as eating rotten flesh. Or you can swap out the poison effect with a nausea effect which would be more realistic when coming in contact with a foul smell.

OPTIONAL

Placing a spunge where there is fog will suck up a small area of the fog surrounding the spunge but when broken will release it out like a cloud.

I do hope this is added as it would make the minecraft experience so much better and also opens up oppurtunites/doors for more mobs ore effects or branches off from effects.

Love your work Mojang keep it up, still always going to enjoy the game even if my suggestion doesn't get added.