What the Earth will Reclaim

The world is ending, but not because of aliens, or nuclear fallout, or zombies.
It is ending because of mankind, because of the near irreversible damage that has been done. a group of radical terrorists seeks to exterminate humanity and return the earth to an era before humanity.
Maia was just trying to live her life when it changed forever, thrusting her into a world of rebels and spies, survival never a guarantee.
Evan wanted to make the world better, but not like this.
The situation seems hopeless, but is it? Can humanity be saved? or is their plight pointless in the face of the opposition.