There was little to no pollution. Everyone was happy, all the time. Animals roamed about freely. The Earth had billions of people living on it. That was in 2020.
Ten years later in 2030, the Earth is evacuated almost completely. There was so much pollution that no one could live there. The moon and Mars are now full of people.
Cassie? What is this place?
Scientists worked hard to make Mars beautiful. They brought water from Earth onto Mars so that the people felt more at home. They built cities and constructed atmospheres.
AT THE END OF THE TUNNEL:
The people on Mars watched from a distance as the Earth blew up into a billion pieces. There was a large volcano inside of the Earth that blew the whole Earth up. Half of the moon was also gone, killing half of the people on it. The other half evacuated to Mars. The moon was slowly falling through space, since it was now unbalanced.
A young girl and her friend Cassie found a long, dark, murky tunnel underground. Above was sunshine and a bright sky. But the tunnel was much different.
I don't know, Emma, but we're too far to turn back now.
At the end of the tunnel, the girls found themselves in a candy land. The water was chocolate, and everything around them was some type of candy. The girls stayed there and never went back to Mars' surface. They used their candy resources and built a house.