The same way you do with any pets, regardless of the number...manually pick it up. Cats are a bit easier to train to a specific spot with sand, a very large pan of litter, etc. , but then it still needs to be removed and thrown away. One of the easiest pickup methods I've ever used outside is a long-handled dust pan and a rake with teeth that are very close together; this keeps it hands-off and doesn't tear up your back in the process.
1. Give away or let someone else help take care.
2. Train them for a special sandbox outside.
4. If lucky enough try to sell feces to people who would find use of them ex. Farmers.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.