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NYT-1201: STATE OF THE ART A Thermostat That's Clever, Not ...

NYT-1201: STATE OF THE ART A Thermostat That's Clever, Not ...

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ovide enough protection.<br />

Soothing pronouncements by local governments and a<br />

cademics about the eventual ability to live safely<br />

near the ruined plant can seem to be based on lit<br />

tle more than hope.<br />

No one knows how much exposure to low doses of rad<br />

iation causes a significant risk of premature deat<br />

h. That means Japanese living in contaminated area<br />

s are likely to become the subjects of future stud<br />

ies — the second time in seven decades that Japane<br />

se have become a test case for the effects of radi<br />

ation exposure, after the bombings of Hiroshima an<br />

d Nagasaki.<br />

The national government has declared itself respon<br />

sible for cleaning up only the towns in the evacua<br />

tion zone; local governments have already begun cl<br />

eaning cities and towns outside that area.<br />

Inside the 12-mile ring, which includes Futaba, th<br />

e Environmental Ministry has pledged to reduce rad<br />

iation levels by half within two years — a relativ<br />

ely easy goal because short-lived isotopes will de<br />

teriorate. The bigger question is how long it will<br />

take to reach the ultimate goal of bringing level<br />

s down to about 1 millisievert per year, the annua<br />

l limit for the general public from artificial sou<br />

rces of radiation that is recommended by the Inter<br />

national Commission on Radiological Protection. Th<br />

at is a much more daunting task given that it will<br />

require removing cesium 137, an isotope that will<br />

remain radioactive for decades.<br />

Trial cleanups have been delayed for months by the<br />

search for a storage site for enough contaminated<br />

dirt to fill 33 domed football stadiums. Even eva<br />

cuated communities have refused to accept it.<br />

And Tomoya Yamauchi, the radiation expert from Kob<br />

e University who performed tests in Fukushima City

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