One part is the effect of the gravitational forces between and among the planets
Most earthquakes<span> and volcanic eruptions </span>do<span> not strike randomly but </span>occur<span> in specific areas, such as </span>along plate boundaries<span>. </span>
Eutrophication is excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.
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The mountains and the climate effected the advance of germans to USSR