Conflict and ethnic persecution forced refugees from the
Balkans to flee their homelands. This is due to the forced migration and ethnic
cleansing in Europe during the 20th century. The Balkans were
affected by discrimination and persecution, and during the Balkan Wars,
thousands of them left their homelands just because they were members of
religious minorities.
Answer:
convection currents are the result of differential heating
When the energy of the waves touches the ocean floor, the water particles drag along the bottom and flatten their orbit.
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Answer:
The Carboniferous era had large deposits of coal matter in the soil. However there was absence of decomposers which gave rise to increased accumulation of organic matter in the soil.
Decomposers make use of oxygen to breathe in the soil due to their existence as animals and not plants. They inhale oxygen and give out Carbon dioxide.
Absence of these decomposers mean increased level of oxygen due to its non usage and reduction in CO2 which is the end product of respiration for the decomposers.