Sug 1. rotting system: New buildings needed: 3. Time to implement in-game: I think about this time.

The rotting system is a system of when foods go rotten,this makes it so food isn't imperishable.Over all,fresh food perishes faster than processed foods(flour,apple pie,bread.).   New building 1. refrigerator:This freezes food so they last the longest in any other container. Recipe: You can chose,probably consisting of metal sheets,metal poles,metal gears and water. Needs: electricity(after it's implemented). New building 2: refrigerated storage.same thing as refrigerator except that tis not net electricity. New building 3: mold research station: needs 10 rotted foods.(hehhehehehehhe....what a wast!:P) 

Sug 2. Sickness and medicine:New buildings needed: 5 time to implement in-game:In the bronze age!(:D).

Sicknesses infect your folk/babies(:P) and makes them sick(also they can get killed if you don't give em medicine.).Sicknesses can be caught from 1: eating or touching rotten foods 2: randomly 3: from dirty clothes(after a long period of time) and 4: from bots(if they are not washed once in a while)

Medicine is well...medicine and can be crafted in a medical lab once researched.

New building 1:Bot Wash.Give away from title.A bot wash to wash off germs. New building 2: medical lab: makes medicine (duhhhhhhhhhhhhhhhh).Only can operate with a illness analyser. New building 3:  germ research station: Needs 10 samples of folk saliva when sick(make a test-tube). New building 4: germ-away shield:You already know what it means :). New Building 5:illness analyser: analyses saliva from test tubes from unhealthy folk/babies and declares what illness it is and if it's deadly or not and sends the results to the medical lab for you to make the medicine(this is a way flowers can be useful).

ATTENTION ATTENTION BRAIN NOT CLEARED OF IDEAS.NEW SUGGESTION COMING SOON TO ANOTHER TOPIC.*BEEP*