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Ashes to Ashes | National Geographic


when a volcano explodes what you’d see

when a volcano explodes what you’d see is this column of dark material rising

is this column of dark material rising

is this column of dark material rising up into the sky and that’s what we call

up into the sky and that’s what we call

up into the sky and that’s what we call volcanic ash volcanic ash is not really

volcanic ash volcanic ash is not really

volcanic ash volcanic ash is not really ash at all it’s made of very fine

ash at all it’s made of very fine

ash at all it’s made of very fine particles of glass it’s frozen magma

particles of glass it’s frozen magma

particles of glass it’s frozen magma shards it would look like a snowfall

shards it would look like a snowfall

shards it would look like a snowfall except it’s not snow it’s ash it weighs

except it’s not snow it’s ash it weighs

except it’s not snow it’s ash it weighs a lot more than snow it’s going to cause

a lot more than snow it’s going to cause

a lot more than snow it’s going to cause buildings to collapse it is also very

buildings to collapse it is also very

buildings to collapse it is also very damaging to engines as it will clog out

damaging to engines as it will clog out

damaging to engines as it will clog out their air systems and in the case of

their air systems and in the case of

their air systems and in the case of airplanes can coat the engines in a fine

airplanes can coat the engines in a fine

airplanes can coat the engines in a fine film of glass which stops them working

when volcanic ash falls on power lines

when volcanic ash falls on power lines we can coat these lines and a fine layer

we can coat these lines and a fine layer

we can coat these lines and a fine layer of volcanic dust when this becomes wet

of volcanic dust when this becomes wet

of volcanic dust when this becomes wet it actually becomes conductive and this

it actually becomes conductive and this

it actually becomes conductive and this can short out the Kura lines effectively

can short out the Kura lines effectively

can short out the Kura lines effectively shutting down the grid

so now we have a giant ash cloud

so now we have a giant ash cloud drifting out over East Asia and volcanic

drifting out over East Asia and volcanic

drifting out over East Asia and volcanic ash is catastrophic for crops you’ve

ash is catastrophic for crops you’ve

ash is catastrophic for crops you’ve ruined the food chain for that year and

ruined the food chain for that year and

ruined the food chain for that year and probably for many years in the future

if you live within a thousand miles of

if you live within a thousand miles of interruption your environment could be

interruption your environment could be

interruption your environment could be poisoned for years the only way you

poisoned for years the only way you

poisoned for years the only way you could live through that kind of ash

could live through that kind of ash

could live through that kind of ash cloud is to seal yourself away you’d

cloud is to seal yourself away you’d

cloud is to seal yourself away you’d have to create for yourself a closed

have to create for yourself a closed

have to create for yourself a closed ecosystem a mini world that was sealed

ecosystem a mini world that was sealed

ecosystem a mini world that was sealed off from everything else the term we use

off from everything else the term we use

off from everything else the term we use for this is a biosphere a biosphere is

for this is a biosphere a biosphere is

for this is a biosphere a biosphere is essentially something that would

essentially something that would

essentially something that would simulate life on Earth in a contained

simulate life on Earth in a contained

simulate life on Earth in a contained environment that might be able to keep

environment that might be able to keep

environment that might be able to keep out all that’s happening on the planet

out all that’s happening on the planet

out all that’s happening on the planet and simulate within it all the processes

and simulate within it all the processes

and simulate within it all the processes necessary to keep people plants and

necessary to keep people plants and

necessary to keep people plants and animals alive

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