The door to the Environmental Biology Laboratory opened, and a panting boy appeared on the other side. Looking around and realizing that the teacher was not yet in the room, he let out a sigh of relief and ran to the group of students from the Upper Zone, bumping his backpack into a boy from the Lower Zone without even bothering to apologize.
The boy from the Lower Zone also didn't dare say anything, pretending that nothing had happened.
In a few minutes, the teacher arrived and class began.
The holographic projector in the center of the room displayed complex graphs about the saturation of carbon particles in the atmosphere of the Lower Zone.
Dr. Aris, a man with excessively smooth skin, a sign of expensive cosmetic treatments from the Upper Zone, pointed to a green line that floated dangerously close to a red zone.
