It is the CARPATHIAN MOUNTAIN RANGE.
This 1,500 km-long range stretches west to east in an arc from the Czech Republic to Romania.
It passes through the countries of Czech Republic in the northwest through Slovakia, Poland, Hungary and Ukraine, to Romania and Serbia.
Sorry, but your question is not really clear but if you are asking for the meaning of "Rapid Population Growth", then here it is:
Rapid population growth has serious economic consequences. It encourages inequities in income distribution; it limits rate of growth of gross national product by holding down level of savings and capital investments; it exerts pressure on agricultural production and land; and it creates unemployment problems.
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It's another term for hurricane