Catastrophic warning about the fate of humanity is given by 15,000 scientists who claim human destruction of the natural world will lead to 'misery' and an 'irretrievably mutilated' planet
- The letter, originally written in 1992, warned of man's impact on the world
- After 25 years, the global scientific community's view is even more bleak
- Second warning letter to the globe was signed by more than 15,000 scientists
- Apart from the hole in the ozone layer, which has now been stabilised, every one of the major threats identified in 1992 has worsened
A prophetic 'warning to humanity' giving notice of perils facing the Earth has been issued by more than 15,000 scientists from around the world.
Climate change, deforestation, loss of access to fresh water, species extinctions and uncontrolled human population growth are all threatening mankind's and the Earth's future.
The letter, originally written in 1992 and signed by 1,500 scientists, argued human impacts on the natural world were likely to lead to 'vast human misery' and a planet that was 'irretrievably mutilated'.
But a quarter of a century since a majority of the world's living Nobel Laureates united to sign a warning letter about the Earth, the global scientific community's view of the future is even more bleak.
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In the second warning letter to the globe, more than 15,000 scientists from 184 countries said humans had 'unleashed a mass extinction event, the sixth in roughly 540 million years'
Apart from the hole in the ozone layer, which has now been stabilised, every one of the major threats identified in 1992 has worsened.
Runaway consumption of precious resources by an exploding population remains the biggest danger facing humankind, say the scientists.
In the second warning letter to the globe, more than 15,000 scientists from 184 countries said humans had 'unleashed a mass extinction event, the sixth in roughly 540 million years, wherein many current life forms could be annihilated or at least committed to extinction by the end of this century'.
People should eat less meat, have fewer kids, consume less and use green energy to save the planet, the world's leading scientists urged.
'We are jeopardising our future by not reining in our intense but geographically and demographically uneven material consumption and by not perceiving continued rapid population growth as a primary driver behind many ecological and even societal threats', it said.
'By failing to adequately limit population growth, reassess the role of an economy rooted in growth, reduce greenhouse gases, incentivise renewable energy, protect habitat, restore ecosystems, curb pollution, halt defaunation, and constrain invasive alien species, humanity is not taking the urgent steps needed to safeguard our imperilled biosphere.'
It used data from governments, charities and individual researchers to warn of a 'substantial and irreversible harm' to the Earth.
They said the the reduction in ozone-depleting chemicals and an increase in energy generated from renewable sources were a positive step.
A prophetic 'Warning to Humanity' giving notice of perils facing the Earth has been issued by more than 15,000 scientists from around the world. Apart from the hole in the ozone layer, which has now been stabilised, every one of the major threats identified in 1992 has worsened
At 8,776 square miles (14,000 square kilometres), this dead zone in the Gulf of Mexico is the largest ever measured, according to a study released in August. The darkest red areas represent the lowest levels of dissolved water oxygen levels (milligrams per litre)
There has also been a rapid decline in the number of children women are having as education levels increase and the rate of deforestation in some regions has also slowed.
But now it required the public to pressure their political leaders to take more decisive action.
This could include more nature and marine reserves, tougher laws to stamp out poaching and trade in wildlife, better family planning and educational programmes, more vegetarianism and less food waste, and massively adopting renewable energy and other 'green' technologies.
Professor William Ripple at Oregon State University said: 'Some people might be tempted to dismiss this evidence and think we are just being alarmist.
'Scientists are in the business of analysing data and looking at the long-term consequences.
In 2015 the Eco Experts has created maps plotting which countries have the most threatened mammals. The firm used the World Bank's World Development Indicator for Deforestation and biodiversity figures
Data from 2015 shows the UK has five endangered mammals. These are almost exclusively marine mammals such as seals and whales that have come under threat from over fishing, including the blue whale, the fin whale, the sei whale and the North Atlantic right whale
In the US there are 35 endangered species, compared to Canada's 11, including breeds of rats, bats and wolves. These include the giant kangaroo rat, the Indiana myosis bat, the black-footed ferret and the hog deer
He said that those who signed this second warning aren't just raising a false alarm.
'They are acknowledging the obvious signs that we are heading down an unsustainable path', Dr Ripple said.
'We are hoping that our paper will ignite a wide-spread public debate about the global environment and climate.'
The article 'World Scientists' Warning to Humanity: A Second Notice' notes 25 negative global trends.
Pictured is the threatened Western black rhinoceros. Runaway consumption of precious resources by an exploding population remains the biggest danger facing humans, say experts
These include a 26 per cent reduction in the amount of fresh water available per capita, a drop in the harvest of wild-caught fish, despite an increase in fishing effort and a 75 per cent increase in the number of ocean dead zones.
There has also been a loss of 300 million acres of forestland, much of it converted for agricultural uses and a collective 29 per cent reduction in the numbers of mammals, reptiles, amphibians, birds and fish.
There are continuing significant increases in global carbon emissions and average temperatures, a 35 per cent rise in human population.
But if there is the will, mankind can move the Earth's systems toward sustainability.
The authors said: 'To prevent widespread misery and catastrophic biodiversity loss, humanity must practice a more environmentally sustainable alternative to business as usual.
By 2030, up to 170 million hectares (420 million acres) of forest (pictured) - equivalent to the combined size of Germany, France, Spain and Portugal - may be lost, experts from WWF have previously warned
'This prescription was well articulated by the world's leading scientists 25 years ago, but in most respects, we have not heeded their warning.
'Soon it will be too late to shift course away from our failing trajectory, and time is running out.
'We must recognise, in our day-to-day lives and in our governing institutions, that Earth with all its life is our only home.
'We can make great progress for the sake of humanity and the planet on which we depend.'
Mankind will destroy the Earth, turning it into a blazing fireball, within the next 600 years.
The renowned physicist believes soaring population sizes and increasing demands for energy will lead to the catastrophe.
Humanity should begin looking to the stars to avoid this fate, he argues, with our nearest neighbour Alpha Centauri the best candidate for our escape.
Hawking urged potential financial backers to get behind a project that could one day lead to manned flights to the system.
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Professor Stephen has warned mankind will destroy the Earth, turning it into a blazing fireball, within the next 600 years. The renowned physicist believes soaring population sizes and increasing demands for energy will lead to the catastrophe (stock image)
It would see a nanocraft probe sent to Alpha Centauri in just over 20 years.
Speaking at the conference, he said: 'The idea behind this innovation is to have the nanocraft on the light beam.
'Such a system could reach Mars in less than an hour, or reach Pluto in days, pass Voyager in under a week and reach Alpha Centauri in just over 20 years.'
The Alpha Centauri star system is 25 trillion miles (4.37 light years) away.
With today's fastest spacecraft, it would take about 30,000 years to get there.
Breakthrough Starshot aims to establish whether a gram-scale nanocraft, on a sail pushed by a light beam, can fly over a thousand times faster.
Astronomers estimate that there is a reasonable chance of an Earth-like planet existing in the 'habitable zones' of Alpha Centauri's three-star system.
It has been a busy few days for Hawking, with not just one, but two doomsday predictions for the future of the planet.
The Breakthrough Starshot project's ultimate goal is to send a fleet of tiny, light-propelled ‘StarChips’ to our nearest star system, Alpha Centauri. An artist's impression is pictured
Humanity must also be prepared to tackle artificial intelligence to stop robots replacing people, he warned at the 2017 Web Summit, held in Lisbon and attended by around 60,000 people.
Hawking said the technology could transform every aspect of life but cautioned that intelligent machines pose new challenges.
He said robots are already threatening millions of jobs but that this new revolution could be used to help society and for the good of the world, including alleviating poverty and disease.
'The rise of AI could be the worst or the best thing that has happened for humanity,' Hawking said via video link at the opening night of the summit on Monday.
'We simply need to be aware of the dangers, identify them, employ the best possible practice and management and prepare for its consequences well in advance.'
Hawking's comments come during an escalating debate about the pro and cons of AI, a term used to describe machines with a computer code that learns as it goes.
Hawking warned at a seperate conference that AI could be the 'worst thing' for humanity, arguing that mankind needs to put measures in place to prevent robots from taking over
Silicon Valley entrepreneur Elon Musk, who is chief executive of electric car maker Tesla Inc and rocket company SpaceX, has warned that AI is a threat to humankind's existence.
But Microsoft co-founder Bill Gates, in a rare interview recently, told the Wall Street Journal that there was nothing to panic about.
Hawking said everyone has a role to play in making sure that this generation and the next are fully engaged with the study of science at an early level.
He hope that this will create 'a better world for the whole human race'.
'You all have the potential to push the boundaries of what is accepted, or expected, and to think big.
'We stand on the threshold of a brave new world.
'It is an exciting, if precarious, place to be and you are the pioneers,' he added.
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