Planet Alverst

After Earth and the rest of the people were left behind to try to save themselves, planet Alverst was forgotten by most. If it was brought up, there was only anger and sadness.
In an underground facility on the East Coast, a lone scientist was working on a solution to kill the black mold and fungus. All the other scientists had left. He did not know where they had gone.
This is the story of his efforts and frustrations and failed experiments. He needed to find something to kill the black mold and fungus without killing the vegetation of Earth.
Other tests arrive when he discovers three children each at a different time without family or a place to stay and takes them in. He has no experience in raising children. How can he take care of them? Later he discovers a grandmother and her cat. He also learns a surprise about the people that were supposed to be on spaceship 4.
Can he survive all these and save Earth?
You will wonder if these underground facilities exist. Could the government be hiding something from us?