I believe its because of the axis of the earth.
The rotating loops of currents that occur in the ocean are referred to as gyres.
Disrupt means, to interrupt by causing a disturbance or problem.
The united states is going to see a big population growth compared to japan and other countries because alot of immigration is happening both legally and illegally to the united states and will see a population surge of more than 5 billion population growth within 2 years
