Suman Sahai
There
is a 2020 film out of Greenland called
Utuqaq which translates to ‘ice that lasts year after year’, in other words permanent
ice. Made by Iva Radivojevic, the film is about the Arctic ice which is now
melting because of global warming. And as the ice melts, nations are scrambling
to corner the ‘real estate’ that is getting uncovered as hundreds of meters thick
ice melts away thanks to the destruction
that we have wrought upon this planet. The vanquished Arctic is being turned
into a commercial hub and greedy prospectors are already scrounging for
minerals and resources to fill the never ending demands of the voracious
consumer.
As
all this happens, scientists go about their business, drilling meters deep for
ice samples to study what happened on Earth thousands, maybe millions of years
ago, for as the sutradhar of the film
says, the ice has a long memory and in it are locked the secrets of what the
air contained a million years ago.
But
there is so much more that this Utuqaq ice contains. It carries embedded live
in its many layers, a chronicle of what the earth was like thousands and
millions of years ago. Which animals roamed the land which birds flew in its
skies and which worms and insects went about their business in these parts. It
has the record of which plants flourished in these regions and yes…it also
has locked in its sheets of permafrost,
the previously known and as yet unknown bugs that inhabited the ecosystems of
the then Earth. Frozen in Utuqaq are also the bacteria and viruses that this
generation of Homo sapiens has perhaps never encountered.
The
world was turned on its head by the pandemic unleashed by the SARS-CoV-2
virus, better known as the Corona virus. We are still not free of the Corona
virus and if experts are to be believed, that serendipitous state is unlikely
to return. Waiting in the wings are the bugs that were scrubbed out years ago,
like smallpox and the as yet encountered viruses and bacteria, that will emerge
from the destruction of once pristine ecosystems.
As global temperatures
continued to rise, scientists predicted that with the thawing of the
permafrost, ancient infectious agents trapped in the
ice for millennia, could be released. Humans would encounter these new agents , bacteria, viruses, even others for the first time
and thus have no immunity against them. Already, such events are being
reported.
In a remote area of Siberia not
so long ago,
when the permafrost thawed, it released the frozen spores
of the Anthrax bacterium into nearby water and soil and
then into the food supply. This resulted in the death of thousands of reindeer
and of one boy. Hundreds were hospitalized. Russian scientists studying the
permafrost had predicted in 2011 when the situation with global warming began
to look dire, that with permafrost melting, “the vectors of deadly infections
of the 18th and 19th centuries may come back, especially near the cemeteries
where the victims of these infections were buried.”
In 2014 and 2015 scientists
discovered two still infectious viruses from a chunk of 30,000-year-old
Siberian permafrost. Although these viruses only infected amoeba, they are a harbinger of what could await
us. Remember that the Corona virus first infected only bats and then somehow
found its way to humans. Such discoveries are indications that other viruses
like the smallpox virus, now eradicated due to extensive vaccinations, could
emerge once again from thawing permafrost, as can the virus causing the Spanish
flu, the earlier pandemic that took some 50 million lives worldwide.
There
is in addition, informed speculation that human viruses from very early times
are likely to be captured in the sheets of the Utuqaq ice. It is possible that disease causing agents, microorganisms like
bacteria and virus , fungi and protozoa that coexisted with the early human
populations that populated the Arctic are frozen in its soil and ice. As the
Arctic ice melts and the land is exposed, these infectious agents would come
into contact with humans. There are several indications that ancient humans
like Neanderthals and Denisovans were plagued by bacterial and viral diseases
like smallpox. There were other disease causing bugs which might have
disappeared but remain frozen in the ancient soil. As temperatures rise -these
bugs could come to active life and multiply, creating a dangerous source of
diseases for the current human
population. This here is just one more reminder that pathogens never really go
away, they just lurk around the corner waiting for a favourable situation to
emerge so that they can jump back in. As the climate turbulence hurtles on,
creating un-programmed and unpredictable situations, we can worry about
potentially catastrophic scenarios unfolding.
Dr Suman Sahai is a
scientist trained in genetics and chairperson of the Gene Campaign
Source: The Citizen, 16 January 2023