Once upon a time, there was a boy named Pedro. He lived on Earth, all by himself. There was no other human besides him. Everyone else lived in a spaceship, in outer space.

He had a simple mission: to look for ways for making the planet able to sustain life again, so humankind could return. And in order to do so, there was a legend that could help him. The legend said:

"There are six guardians hidden all around the world and only the chosen one would be able to find them.

The guardians would show him how to restore life on Earth and save the world. Every guardian could be found somewhere related to the energy they focused on."

Pedro didn’t know if he was the chosen one, but he had to try. He was the human race’s last hope.

When he finally got to the top, he saw a woman and when their eyes crossed, he noticed that she was very surprised and the woman proceeded to say:

"A human! On Earth! You must be the chosen one, and my sacred duty as the guardian of wind is to tell you one of the options to save the Earth: eolic energy, this is the energy of the wind, on human’s era this was obtained mainly by a wind turbines, it was noisy and expensive at first but it was renewable and needed low maintenance, so a country once called China used it. Now you shall go to the driest desert that used to be this country where you will find the second guardian. Go and good luck!"

Pedro came down, he felt happy and with hope, also he remembered that when he was a child, his mother (whom he had very few memories of) once told him about the driest desert, so he started walking to where he remembered she said it was.

After a very, very long walk he finally saw how the trees stopped growing; the beginning of the desert. He kept walking because he assumed that the guardian would be in the middle of the desert;  but it wasn’t long before he spotted what appeared to be a man’s figure. The closer he came, the most excited he was. When he finally got close enough to talk to him, he presented himself and told what his mission was, and the guardian responded.

"I am the guardian of sun and I will be honored to tell you about the second hope for Earth; solar energy. This is the energy obtained by the sun, and it used to be produced by object called solar panels when the sunlight hit them. Like the eolic energy, it needed low maintenance and was renewable, but it needed lots of space and it wasn’t very cheap, the once existing country of Germany used lt. Now leave! And follow the direction from where the sun comes out for 9,000 steps, there you shall find the next guardian."

Pedro did as told and started counting on his way to the sun, and after what felt like an eternity he finally made it. He was in a very polluted beach, but there was nobody there. He thought he maybe had miscounted the steps or simply not followed the right direction, but in between those thoughts he heard: “It used to be beautiful.” He turned around and saw a woman, and before he could said anything she proceeded. “But it got polluted Anyway, you must be Pedro, I have heard about you. I assume you are here for the third way to save the world, and as the water guardian I shall tell you, it’s ocean energy. This was obtained from turbines moved by the tide and waves, this type of energy was highly predictable and abundant, but also affected vessels and was just adequate for certain type of places. That’s what you should know about this type of energy, and now, hurry! Your journey is yet far from finished, you need to go the hottest volcano to find the next guardian and time should not be wasted, good luck and may we meet again!”

So he got to it. He walked until he could see the hottest volcano. He climbed to the very top, even if his feet hurt from tiredness. There, he watched the crater with amazement. “Do you like it? I love spending my hours here. Not because I don’t have a choice since I have been waiting for you to come since humanity left, obviously it’s because it’s very nice.” The sarcastic voice of a man said from behind him. Pedro jumped because of fear, and the Guardian of the Hydrogen laughed. “You must be Pedro. Let me  explain to you another way of saving Earth: the hydrogen cell. This was generated when the water of a dam was let down a pipe, its movement caused a turbine to also move and finally create energy, this kind of energy does not emit global warming gasses or other air pollutants, but it can not be build anywhere and can also damage the waters quality it was mainly used in the country once called China, I think that you have already watched how does the country look now. Well it's time for you to continue your journey, next you need to travel all the way north until you found the geyser, where the next guardian will be, bye.

Pedro was on his way of getting to the geyser when he heard something. He could see the geyser a few miles from where he was, but something inside him told him to go find out what was making that noise. So he stopped and headed towards it. The noise was coming from a giant dumpster. There was trash everywhere and Pedro could hardly walk. When he was about to fall because he slipped with a laptop, a hand held him. He looked up and saw a man.

“The Guardian of the Gravity!” whispered Pedro as he stood up, “Thank you.”

“You’re very welcome,” said the guardian with a smile. “I cannot believe you have made it this far. You’re almost done with your mission”

“Could you help me? I can’t wait to finish, I want the humans to return already.”