Does this sound like a good story line?

okay so it takes place a long time in the future. It is after we had destroyed the earth and there is an ice age. Most of the people die but some surivive. When the ice age ends the earth has changed. It is gray and most of our resorces have been used up. the continents have formed together and there is far less land. So this little girl finds her ansectors diary and figures out that we did this to the earth. She also figures out she can save it. It is very hard but eventuly she does. the story ends when there is a party for the whole world. ( this is only like 10 000 ppl.) ha ha just more than BCs 100th birthday of guides! Anyway, sound good?