I will have u know that from formerly working at a produce co. in L.A we had a room called a hothouse where we would ripen all our fruit for sale. Just spray em down with some water and wrap em in cellophane and stick em in a warm humid enclosed room. He is right as fruit ripens it releases a gas which helps to ripen the other fruit around it. But I don't think the process can be applied to cannabis, since its more of a blooming than a ripening like a tomato or a banana.