What coal mine is still burning?
Connor AndersonUnderground mines i n JHaria DHanbad India was burning for the past 40 o r 50 years.
I have seen this in 1970 period. smoke coming out from ground.
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Ian AshlandThe Centralia coal mine in Pennsylvania, USA, is still burning.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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