It's been proven that people have soul. What is soul no one knows. When human dies, body releases energy.
How was this proven? Especially since you then state that no one knows what a soul is, you have left me puzzled.
When you say the body releases energy do you mean the process by which the last of the body's glucose is used by our cells to create ATP followed by our enzymes breaking down cells causing the process known as putrifaction once the ATP has been "used up" for lack of better terminology?