Exact(48)
Winning such permission can be arduous because rare earth refineries produce thousands of tons a year of low-level radioactive waste.
But he said usage was increasing fast because rare earths are now used in so many consumer goods and because of the growing demand for such items in emerging economies.
That is largely because rare earth mining and processing can be so environmentally risky, creating toxic and even radioactive wastes, that other countries have tended to avoid or abandon production.
Despite the name, rare earths are actually fairly common; they are expensive and seldom mined elsewhere because the processing equipment to separate them from the ore is expensive and because rare earths almost always occur naturally in deposits mixed with radioactive thorium and uranium.
Students should predict in advance that genetic variation will not be maintained under these conditions, because rare advantage is absent.
However, a stable supply of rare metals is difficult on a global scale because rare metals are expensive and localized, and their abundances are extremely low.
Similar(12)
The safety commission and consumer advocates maintain that the ban is warranted because rare-earth magnets are irresistible to children, even if the packaging says the toys are intended for adults.
(Well, scat play is a little more rare because, ew).
Because these rare interventions cannot be overridden, they are not popular with all pilots.
This ore body will be developed because a rare earth deposit is, in Avalons grade and configuration, rarer than rare.
This is important because new rare but serious adverse events are less likely than, say, with a new chemical.
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