One experienced i got from this great visit, was that, green leaf signify a fertile land for agriculture while agriculture signify life at large.
That is why is very difficult for some animal to survive without green leaf. It is very crucial to also note that even humans as well cant survive in the absence of vegetables which serve as vitamins. Vegetables make us healthy and gallant also. Lack of vegetables in our life always prompt us to unhealthy living. It helps to activate our antigens in our body.