Working of survival systems for droods .

There are many posts requesting devs about adding food , water ,etc and in this post i will tell about simplest way of adding survival systems for droods.
It will make career mode more interesting in future.

1. Like we keep fuel, battery, etc in fuel tank , there could be an option of three things namely food ,water and oxygen to be kept in fuel tank.
2. Like each electrical components consume power, droods will also consume some of these things .
   3.But instead of consuming whole supplies like engines consume fuel ,they will generate waste, say 20% of capacity of whole tanks which can't be consumed further and will be added as dead weight.
   This opens possibility of simple machines to recycle waste by using electricity. (It dosen't mean that food ,etc. will be infinite. It will make it last a bit more long .)
   Nothing more that's it ,I'm not requesting you to add complex drill and extraction systems. As you have added new electrical systems ,it can be also added.
   Have a nice day and please tell your views about this idea =)