Thanks to all technological advances, the humans discovered a way to introduce themselves into a machine and go to a world called Pandora in the form of the animals. The animals that lived there were called Avatars, They were the species that protected and loved the most the nature. Their whole live turn around protecting in and to make a civilization with good values and good traditions.
When the humans managed to go to Pandora, they were amazed by all the sources that they could take and robe from this world to take them to the human world and sell it at a very high price. This ambition of the humans was growing and became a complication with the avatars since they take care of nature a lot. So began a constant war and for the rights of the avatars, for the invasion and the reform and care of nature in Pandora.
The habitants of Pandora get to a peace agreement with the humans: After a decade of war between humans, the Avatar’s got to an agreement with the human race, and this agreement consistent in a peace treaty, but this treaty had one implication. This implication was that humans could deposit some wastes from their planet in Pandora.
Humans started to transported their wasted with permission. They just dumped their wastes with any type of protection. Without caring about the health of the avatars and the rest of the animals that lived there. Also, they did not even try to separate and make the decomposition of these products faster. Finally, they threw the garbage everywhere in pandora, so everything was getting contaminated and the animals were dying thanks to this.