How can Conversation Schemes help Humans?

1. Human Food Supply is Ensured, if the Species aren't Used up too Quickly 2. Making sure the Food Chain isn't Damaged as badly, remember the Food Web is all Interdependent 3.Ensuring that there is Medicine still to be used, Plants give out very Important Medicines that fight Diseases 4. Having Industrial Materials and Fuel - Plants and Animals are needed for Industrial Meetings and some Fuel, they all die out then it'll be Harder to get the Fuel