What would you happen if, overnight, the Humanity disappeared of the face of the Earth? During how long would our works and our influence last on the environment? How would you get ready them the world without us? This intriguing premise thinks about in this line of time where we see what you would happen to the Humanity's legacy - the good thing and the bad thing - with the step of the years.
In your book "The world without us", the journalist Alan Weisman speculated with scientific rigor on how long the prints would last in our planet left by the Man, and this way to analyze the impact of the Humanity's stocks on the environment from a new and original perspective.
Centered hypothetically in a city of New York lacking all human life, Alan's work Weisman analyzes, year after year, century after century, millennium after millennium in even in periods of millions of years, the consequences of the sudden disappearance of the human beings. The book offers us a valuable tool to meditate on the important paper that play us in the concert of the Nature, and what we should make to leave a worthy legacy of our step for the Earth.
Let us see in detail the evolution in the time of a world without us.
2 days: To only 48 hours of the Humanity's disappearance, the undergrounds of New York are flooded hopelessly due to the interrupt of the systems of pumping of water.
7 days: The supply of emergency fuel for the generators that refrigerate the core of the nuclear reactors, is overworked completely.
1 year: In the whole planet, more than a thousand million birds they survive every year fading the lights of warning of the towers and antennas of communications, and when cooling down the high tension cables. The animals begin to return slowly to the vicinity of the nuclear set on fire power stations or melted, as the radiation descends.
3 years: For the ullage of heat, they explode the pipes of the cities of the coldest areas. The outlets of gas cause enormous fires that you/they will only be able to fade with strong rains. The buildings begin to crack: cracks appear and the structures become unstable. The ullage of a lukewarm environment causes the disappearance of the cockroaches in the cities of temperate temperature, after one or two winters.
10 years: The erosion caused by the leaks and the merged share of the elements ends knocking down a great number of caps of housings.
20 years: The iron columns that support the air railroads of New York are totally eaten away. The Channel of Panama disappears for the advance of the vegetation and America are bound again. The vegetables demean until transforming into species non groceries again.
100 years: With the disappearance of the ivory traffic, the mean million of outliving elephants one century behind, you have multiplied for twenty. The populations of petty predators - raccoons, weasels, foxes - they are in backspace and in abatement hazard due to the appearance of a highly voracious and implacable new competitor: the domestic old winch.
300 years: The hanging bridges finish collapsing. The walls of numerous dikes no longer resist the maintenance ullage and the leaks of water flood the near cities.
15 thousand years: The walls of New York and other big metropolises succumb finally before the advance of the glaciers. The only structures that last relatively intact in the world they are the subtérraneas; for example, the tunnel of the Channel of the Blemish.
35 thousand years: The lead residuals that infected the environment during the time in that the humans still walked on the Earth, could finally be absorbed and degraded by the Nature. For other compounds, as the cadmium, you will have to wait other 75 thousand years.
100 thousand years: The levels of dioxide of carbon in the atmosphere return to the existing securities before the Humanity's (although this perhaps could take a little more than time) disappearance.
250 thousand years: The levels of plutonium radiation contained in the nuclear (whose carcazas many have disappeared for the corrosion, many millennia before) bombs are absorbed finally by the floor and they no longer represent an amenanza.
2 million years: For this time, you are possible that certain microbes have evolved enough like to degrade the plastic products and to feed of them.
7.2 million years: The traces of some architectural (statues, monuments) works still remain in foot, if you are that they were not destroyed by earthquakes or floods. Toxic many chemists taken place by the human beings (PCB, dioxins, etc.) they still conserve your mortal power.
10.2 million years: The brass sculptures still continue being recognizable.
3000 million years: The life persists on the Earth, although in ways that we are not even able to imagine.
4500 million years: The mean million of tons of uranium 238 present only in the United States, you arrive halfway your cycle of life. The Earth begins to warm due to the expansion of the Sun. At least during a thousand million years more, the dominant forms of life will be the microorganisms, just as in the beginnings of the life on the planet.
6500 million years: The Earth melts for influence of the Sun that have absorbed already to the interior other planets, marking the unavoidable end of our planet.
All the Eternity: The fragments of the radio communications and television transmitted by the Humanity during your brief step for the planet Earth, they continue traveling through the space like only print of our remote existence.
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