It's hotter than it should be in one of the greenest areas of Madrid. Marta, Alejandro, Katrina, José and Martín are seating in the shadow of a tree at El Retiro Park. On a Friday, they would be at the gates of the Spanish Parliament. On a Friday, they would be shouting at the lions guarding the entrance to the Lower House that without a planet there is no future.

These are five of the thousands of youngsters that decided to mobilize ahead of the environmental disaster that's coming. They are part of 'Fridays for Future', a movement asking students all over the world to skip classes on Friday to demand measures against climate change.

Tomorrow, Friday, May 24, it will be their 12th meeting. But first and within the framework of the global strike for climate, at noon they will demonstrate at Plaza del Sol to request the declaration of a climate emergency status.

All but Alexander will be at this demonstration at the capital city, instead he'll be going to Brussels to meet with other 'Fridays for Future' young activists. Including Greta Thunberg, the 16-year-old youngster who started this movement infront of the Riksdag - Sweden's parliament- in August 2018. This meeting's date is key: In less than three days we will decide, with our vote, the future of the European Union.

"The main problem is the increase in temperature: from this single threat hundreds of other threats arise. We only have until 2030 to try and make sure that this is not irreversible", a worried Alejandro points out.

Martin, who remains in touch with Belgian environmental activists, explains: "To transform an industry so that it stops emitting CO2 now costs X, but to correct the impact that industry will have if that happens after 2030 costs 5000X".

Among the many data justifying these youngsters' preoccupation are those regarding Spain, making it one of them most threatened countries of the European Union "since two thirds of the territory could become a desert".

They are not making this up; all they do is paying attention and understanding what scientists have been saying over and over again. They are the amplifiers for those researchers no one listens to. "We are just repeating what science has been saying for decades. Many of them are using public funds to gather all of this information. But then politicians play deaf with them", says Alejandro.

A good example would be the report published at the end of March by the Government of Spain's Meteorological Agency (Aemet) warning, among other things, that summers are now five weeks longer than in the 80s.

And yet, this information doesn't seem to affect the political discourse. Katrina, a 20-year-old activist from the Canary Islands points out that in the two televised debates for the electoral campaign of April 28, "there were only three references to climate change". "They threw shit at each other, but they never confronted the problem as they should have done. No measures were proposed", she asserts, upset.

The solution? "We have amazing access to the sun that not that many other countries have. Yet, we're still exporting solar energy. We are going to install solar panels in the US or Saudi Arabia when we could install them here and become a green country. We have to implement our own model", says José, a 22-year-old activist from Seville.

Martha, the youngest of this group, thinks that a "radical" change of the capitalist system is really urgent, a complete "restructuring of society as a whole". According to this 19-year-old, this remodeling process won't be feasible if people are not adequately educated.

"To be educated to ask ourselves, hey, what are we doing with our planet? To see how our system works and why it generates the results it generates", she points out. These activists remind us of Madres por el clima [Mothers for climate] and Teachers for Future, two similar movements requesting an education based on climate awareness for both children and students.

There are many other similar organizations demonstrating how mainstream this protest is. "Every kind of people, from every ideology", asserts José. From the left and from the right, teachers and scientists, mothers, fathers, citizens from all over the world... defending our planet. "Only in this way, uniting so many different people, we can gain momentum for movement", he asserts.