What can be used for heating a building by a heating system?
the Sun's rays peachleaf willow engines oxygen photosynthesis photons air hydrogen and oxygen
A B C D E F G H
Solar energy is the energy in the sun's rays.
the sun's rays can be used for heating a building by a heating system
What can be used for heating a building by a heating system? (A) the Sun's rays (B) peachleaf willow (C) engines (D) oxygen (E) photosynthesis (F) photons (G) air (H) hydrogen and oxygen