Bantu, The bantu tribe migrated across Africa bringing iron with theim in arround 3000 BC.
The flow of air in a loop caused by differences in temprature and pressure is called <span>Convection</span>
With the growth of industrialization, many countries in
Europe experience an increase of wealth.
This also led to competition among European countries. They saw a need to protect their interest and
with that they began to strengthen their military and this led to formation of
alliances. As competition became more
intense it affected political affairs as well which later lead to war.
