Guess the title of the following book from its summary.
Input: It is 2050 and the human race is on the brink of extinction. Global warming and pollution have taken their toll on the planet and it is up to a young girl and her loyal companions to save the world.
The book is titled "The Last Hope: A Young Girl's Mission to Save the World".
The title of the book is: "A Journey of Hope: A Threshold of Survival".