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The climatological and geological processes of the planet are being driven primarily by human beings for the first time in the Earth’s history, according to the Director of the Earth Institute.
Jeffrey Sachs, Special Adviser to the UN, said that he believes the Earth has entered a new age, the Anthropocene Epoch, where human activity is dominating many of the major processes on the planet.
Speaking at the Times Cheltenham Literature Festival, he said: “We are in the human driven phase of the earth, where core earth processes are actually dominated by human activity right now. That's a shocking concept for me, but I think it's right. It absolutely has not penetrated our understanding, and certainly not our political institutions and definitely not our policies and our behaviours.”
The term ‘anthropocene’ was coined by noble laureate Paul Crutzen, who discovered the ozone depletion effect, and the epoch is said to have begun in 1784, to coincide with James Watt’s invention of the steam engine.
Crutzen coined the term to replace the geological term Holocene, which refers to the current period as simply a “post ice age” or “interglacial” era in the Earth’s geology.
Mr Sachs said of climate change that: “Scientifically, it is being proven every day now to be far more dangerous and far more worrisome and close to the edge than we believed.
“We're destroying rainforests massively, altering habitats, acidifying the oceans, destroying coral, driving multiple species to profound declines of abundance and it's believed, although not proved, millions of species to outright extinction.
“Populations have taken over every ecological niche so extensively that our problems are not merely the climate change problem…but involve every part of the earth's systems. Humans have taken over the carbon cycle, that's the greenhouse effect. We're learning just how dramatic the climate change is likely to be, how it's being masked by pollutants that will be unmasked over time showing us that the warming is actually much larger than has already been observed.”
Mr Sachs explained that human beings have also taken over the Earth’s hydrogen cycle, and also the nitrogen cycle, by using tens of billions of tons of nitrogen-based fertilisers every year, which seep into groundwater and rivers and cumulate in the estuaries of the planet’s great river systems.
“We're having such profound effects in so many ways. This is not under control.
“George Bush has not lost a lot of sleep over this in the last eight years, and we don't have effective mechanisms right now for dealing with these factors.”
He also explained that climate change was having a more far-reaching effect than was realised, and could be the root cause of extremism and fundamentalism in parts of the world affected by changing environment.
Talking of extremist terror campaigns, he said: “These are not driven by ideology and by conflict with the West. They are driven by hunger, lack of water, lack of contraception and lack of livelihood.”
Mr Sachs said that the “fantasists” in the White House need to address the problem, but he expressed fears that the current financial crisis would completely divert attention away from the need to tackle climate change before it is too late.
“We have to stop short-term fire-fighting and focus on the long-term. Ok, we are having a financial crisis, but we must not stop working on climate change. These are the defining challenges of our generation.”
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