Riddle!!! =)?!
Question: What is black when u buy it, red when u use it, and grey when u throw it away?
Answers: What is black when u buy it, red when u use it, and grey when u throw it away?
charcoal.
your lungs no i agree with the first answer ^
charcoal ^-^
is it coal?
because it's black at first, then it turns red when it is burned because of the heat and then its gray when it turns into ashes
newspaper
it's charcoal