I have heard the same thing about energy being destroid, We are a sorce of energy, we also have electical impulses in us. If you watch ghost hunters how do you exsplain what they are showing also the reaseardh on the area or building they are looking at and find out that the ghost they are hearing is that of a person who died there. I guess if you never had any experiances like my self you most probably wouldn't believe in ghosts, How ever the things I have exsperianced are unexsplain able exspecially when some one else sees the same thing you saw.