Story 4. World of Light
Long ago people used candles to see at night.
But now we have electric lights.
It seems like our whole world is filled with lights.
There are lights of all colors.
There are big lights that light up soccer fields.
And there are little flashlights, too.
We have so many lights that you can see them from space.
Maybe we should turn out a few lights.
What if we turned out some of the lights?
