Content: The main focus of this class is renewable energy, that is, energy that occurs naturally and repeatedly in the environment and can be used by humans.
(The main focus of this class; is; renewable energy) (that is, energy; occurs naturally; L:in the environment) (that is, energy; can be used; by humans)
The main focus of this class that is, energy that is, energy
is occurs naturally can be used
renewable energy
L:in the environment
by humans