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The Great Pacific garbage patch, also described as the Pacific trash vortex, is a gyre of marine debris particles in the central North Pacific Ocean, discovered between 1985 and 1988. The patch is characterized by an exceptionally high relative concentration of pelagic plastics, chemical sludges and other debris who were trapped by the current of the North Pacific Gyre.Its extenzion is estimated between 700.000 and 1000.000 square km (then more of the iberic peninsula and perhaps more of the untide states). Its low density prevents the detection from the satellites, but it can be seen by casual boaters or divers in the area.
The scientists, after a lot of research all over the oceans, have estimated that the amount of garbage that is near the seas is about 275 milion of tons, but the amount of plastic that is actually in the ocean is between the 4,7 and the 12.7 million of tons, and it's increasing every moment. The biggest responsible of this problem is overpopulation; in fact Asian countries,who are the most populated, are also the most polluting states,but it isn't the only one: for example a sea wave can overtrhow container one the boats, or a seaquake can destroy a civilized river and capture the disaster debris.
It's considered one of  the most dangerous kinds of seas contaminations due of small plastic pieces which can smother little seas animal,or trap the bigger ones.
Since 2001 the plastic became part of the food chain. This problem impacts not only the marine ecosystems, but also the fishing industries and as a result the places where this animals are eaten, like restaurant, specially in Asia where the fish cuisine is very widespread.
There are so many project which are trying to manage this problem, like Blue Dream Project and Garbage Patch State, but only  a few of them are actually working mainly because the majority of them aren't funded by the states ,but only by volontary donation; one of the best was designed by the student Boyan Slat like a zero-cost project, using only the energy of sunlight and the currents,  recycling materials collected on the ground

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"Angiolella"

With space debris, orbital debris or space junk we talk about all the rubbish orbiting around Earth without being reused in more useful ways. Fall into this definition debris of rockets, satellites fragments, paint flakes, dust, material expelled from the rocket motors, coolant released by nuclear satellite RORSAT and other small particles.

Space debris has increased dramatically in recent years, becoming a growing problem due to the high possibility of collisions with active satellites which in turn produce other debris following. This situation is called “ Kessler Syndrome”. The clash, even with small debris, can be destructive due to the high orbital velocity.

The problem about space junk is very interesting and it must be considered as soon as possible because the gravity can attract the giant debris masses and they can precipitate on Earth.

This matter could extinguish a lot of terrestrial species, as what happened to the dinosaurs.

This problem isn’t simple to manage because the atmosphere is very far .

"Gentilcore"

There are  some radar sensors with lasers who are used to track space debris. However, it’s very difficult determine accurately  the debris orbits. Also there are objects smaller of 10 cm and it’s so difficult draw them  because their very small section  reduces the orbital stability. The maximum density of space debris is  at  an altitude of  1000 km. On this altitude orbits about  1 items / hm ³.

The space debris cause clash,  and a big one is  occurred on 22th January  2013, when  the debris caused  the explosion of the Chinese satellite ” Fengyun  1C ” and the nano-satellite “Blits” . The collision between the Chinese satellite and the Russian one  cause  the changes of the orbits and the rotation speed of space debris, so now  the scientist must  calculate the direction and the impact point to prevent other clashes