When people are badly burned, doctors can perform a skin graft operation where they take healthy skin from one area and use it to help the burned area heal. Why is this possible?

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.

Gases enter the atmosphere and trap the sun's heat warning the earth.

Sorry  i don't understand can you rephrase that