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SUPERATI 4 DEI 9 LIMITI DI SOPRAVVIVENZA DEL PIANETA–THEY HAVE BEEN EXCEEDED 4 FROM 9 LIMITS OF SURVIVAL OF THE PLANET

 

SUPERATI 4 DEI 9 LIMITI DI SOPRAVVIVENZA DEL PIANETA

 

Quotidianamente tramite i media sentiamo varie notizie catastrofiche che riguardano la situazione del nostro pianeta, purtroppo è stato sfruttato in passato senza nessuna regola e nessun rispetto da gruppi e aziende che a fronte di un immediato guadagno o beneficio distruggono tutto, senza un minimo pensiero o scrupolo verso i nostri figli e le generazioni che verranno. Oggi visto questa apparente presa di coscienza cosa ci possiamo aspettare? Che le cose siano migliorate? Assolutamente no!! Perche’ a parte le parole e le azioni di pochissimi gruppi purtroppo impera sempre la legge del “dio denaro” sopratutto in aree del pianeta come la foresta amazzonica e i paesi asiatici dove la popolazione si trova in minoranza e in difficoltà economica e nonostante le proteste non viene ascoltata. Ma questa è una lotta che riguarda tutti, perchè ci vediamo costretti a difenderci nostro malgrado dai periodici “assalti” di vari gruppi, che vogliono sfruttare e distruggere il territorio solo per il loro vantaggio personale.

Per nostra conoscenza riporto qui di seguito un articolo di Agnese Tondelli da Ambiente Bio.

Nel 2009, i climatologi pensarono bene di mettere a punto uno schema che consentisse di monitorare i segni vitali del pianeta. Così individuarono nove limiti planetari all’interno dei quali la vita umana sulla Terra poteva continuare a prosperare.

Questi limiti sono

1) il cambiamento climatico

2) l’acidificazione degli oceani

3) la riduzione della fascia di ozono nella stratosfera

4) la modificazione del ciclo biogeochimico dell’azoto e del fosforo

5) l’utilizzo globale di acqua

6) i cambiamenti nell’utilizzo del suolo

7) la perdita di biodiversità

8) la diffusione dell’areosol atmosferico

9) l’inquinamento dovuto ai prodotti chimici antropogenici.

Sempre nel 2009, i climatologi stabilirono che già tre di questi limiti erano stati superati:

troppa anidride carbonica immessa nell’atmosfera, troppo azoto sottratto all’atmosfera e biodiversità in declino.

Ora, un nuovo studio pubblicato sulla rivista Science ci dice che abbiamo superato anche un altro limite: quello del cambiamento nell’utilizzo del suolo, attraverso una deforestazione selvaggia. Troppi alberi sono stati tagliati per uso agricolo.

I dati sono stati aggiornati grazie al lavoro di un team composto da 30 ricercatori che lavorano per 19 diverse realtà accademiche. Secondo quanto affermato, non solo abbiamo superato i limiti prefissati di alcuni degli indicatori di salute della Terra ( dalle 350ppm di C02 in atmosfera siamo passati a 400; dal tasso annuo di estinzione della specie considerato “tollerabile”, che è 10, siamo arrivati a superare i 100 e così via), ma siamo vicini a superarne anche altri, come ad esempio il limite di consumo annuo di acqua dolce o il livello di acidificazione degli oceani.

Secondo Steve Carpenter, dell’ Università del Wisconsin:” Abbiamo modificato i cicli dell’azoto e del fosforo enormemente più di qualsiasi altro elemento. L’aumento è nell’ordine del 200-300%. Per contro il carbonio è aumentato del 10-20% e guardate quale putiferio ha causato nel clima”.

Valori come quelli dell’azoto e del fosforo, che vanno a incidere sopratutto sulla qualità dell’acqua. Valori inoltre che sono distribuiti in maniera disomogenea sul nostro Pianeta: in quantità esorbitanti nel Wisconsin e con gravi carenze in Africa.

All’interno dei limiti fissato dai climatologi, la popolazione può continuare a vivere. Ciò non significa che le soglie indicate sono come l’orlo di un baratro. Piuttosto che al di là di questa soglia c’è una condizione di incertezza, con condizioni a noi sconosciute e non prevedibili.

Come spiega sempre Carpenter:” Sappiamo che l’umanità può farcela nelle condizioni dell’ OLOCENE, perciò sembrebbe saggio cercare di mantenerle”:

Will Steffen, primo firmatario dello studio, ha tenuto a sottolineare come questi non siano problemi del futuro, piuttosto questioni da affrontare con urgenza:” Quello che la scienza ha mostrato è che le attività umane-crescita economica-tecnologia-consumi, stanno destabilizzando l’ambiente. Non si tratta di problemi futuri, ma attuali. Il boom economico degli anni ’50 e l’economia globalizzata hanno reso più veloce il processo di superamento dei “Confini Planetari”. Non è possibile prevedere esattamente quando l’umanità arriverà al punto critico, ma di questo passo la destabilizzazione del “Sistema Terra” potrebbe avvenire in un periodo compreso tra alcuni decenni a un secolo”:

I confini sono come segnali di pericolo. Non vi è alcuna certezza che dopo la trasgressione dei limiti avverrà la catastrofe, nessuno sa cosa accadrà dopo, è molto probabile , però, che la terra sarà molto meno ospitale per lo sviluppo di nuove società.

Anche la NASA ha intensificato la propria attività di osservazione satellitare della Terra, pubblicando un sito web dedicato interamente ai cambiamenti climatici. Visualizzati come su un monitor biomedico, nella home page vengono indicati cinque segni vitali del nostro pianeta accompagnati da valori e variazioni: ghiacci artici e antartici, livello di CO2, livello del mare e temperatura globale.

THEY HAVE BEEN EXCEEDED 4 FROM 9 LIMITS OF SURVIVAL OF THE PLANET

 

Daily through the media we hear various catastrophic news concerning the state of our planet, unfortunately it has been exploited in the past without any rules and no respect from groups and businesses in the face of an immediate gain or benefit destroy all, without the slightest thought or scruple to our children and generations to come. Today saw this apparent awareness of what we can expect? That things have improved? Absolutely no!! ‘Cause the words and actions of a few groups unfortunately prevails always the law of the “money god” especially in areas of the world such as the Amazon rainforest and Asian countries where the population is in the minority and in difficult economic times and despite protests It is heard. But this is a struggle that concerns us all, because we are forced to defend ourselves against our will by periodic “assaults” of various groups, who want to exploit and destroy the land only for their personal benefit.

To your knowledge reproduce below an article by Agnes Tondelli by Environment Bio.
In 2009, climate scientists thought it best to develop a scheme that would allow to monitor the vital signs of the planet. Well spotted nine planetary boundaries within which human life on Earth could continue to thrive.
These limits are
1) climate change
2) ocean acidification
3) the reduction of the ozone layer in the stratosphere
4) modification of the biogeochemical cycle of nitrogen and phosphorus
5) global usage of water
6) changes in land use
7) the loss of biodiversity
8) dissemination dell’areosol pollution
9) pollution due to anthropogenic chemicals.

In 2009, climate scientists have determined that three of these limits were exceeded:
too much carbon dioxide into the atmosphere, too much nitrogen from the atmosphere and biodiversity decline.
Now, a new study published in Science tells us that we have passed another limit, that the land use change, through deforestation. Too many trees were cut for agricultural use.
The data have been updated thanks to the work of a team of 30 researchers working for 19 different academic institutions. As stated, we have not only exceeded the limits set by some of the indicators of the health of the Earth (from 350 ppm of C02 in the atmosphere we moved to 400; the annual rate of extinction of species considered “tolerable”, who is 10, arrived in exceed 100, and so on), but we are close to overcome also others, such as the limit of the annual consumption of fresh water or the level of acidification of the oceans.

According to Steve Carpenter, University of Wisconsin: “We have changed the cycles of nitrogen and phosphorus vastly more than any other element. The increase is in the order of 200-300%. In contrast, the carbon is increased by 10- 20% and look at what has caused uproar in the climate. ”
Values such as nitrogen and phosphorus, which they affect mainly on water quality. Values that are also unevenly distributed on our planet: in excessive amounts in Wisconsin and with serious deficiencies in Africa.
Within the limits set by climate, the people can continue to live. This does not mean that the thresholds are specified as the edge of an abyss. Rather than beyond this threshold there is a condition of uncertainty, with conditions unknown to us and not predictable.

As always Carpenter explains: “We know that humanity can do it in terms of ‘HOLOCENE so sembrebbe wise to try to keep them”:
Will Steffen, lead author of the study, was keen to emphasize that these are not problems of the future, rather issues to be addressed urgently: “What science has shown is that human activities-economic-growth technology-consumption, are destabilizing the ‘environment. These are not problems in the future, but today. The economic boom of the 50s and the global economy have made faster the process of overcoming the “Planetary Boundaries”. You can not predict exactly when mankind will come to critical point, but at this rate the destabilization of the “Earth system” could take place in a period of several decades to a century “:
The boundaries are as warning signs. There is no certainty that after the transgression of the limits will be a catastrophe, no one knows what will happen next, it is very likely, however, that the land will be far less hospitable for the development of new companies.
Even NASA has intensified its activity of earth observation satellite, publishing a website dedicated entirely to climate change. Displayed on a monitor as biomedicine, the home page indicates five vital signs of our planet accompanied by values ​​and variations: Arctic and Antarctic ice, CO2 level, sea level and global temperature.

Permalink link a questo articolo: https://www.artskyintheroom.com/superati-4-dei-9-limiti-di-sopravvivenza-del-pianeta-they-have-been-exceeded-4-from-9-limits-of-survival-of-the-planet

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