They were loosing their lands that's why we can choose a) weak leadership
Deep ocean currents don't move as much XD
Answer:
its 117 times greater then the moon
The more people that are migrating to urban areas (urbanization) needs more crops for the citizens which causes more people to grow crops and without crop rotating or methods to prevent soil degradation. More likely answer is that more industry grows in the urbanized areas and they have poor management of the soil which causes soil degradation<span />
