There is a mistake in the fragment below, is not there?
Why the damm "a" before the word "sun".
Energy from the sun in the form of heat and light is abundantly available to everyone on Earth, even in places that do not get a lot of a sun.
I think it's a typo- delete it and it reads better:
places that do not get a lot of sun.
places that do not get a lot of a sun.