The poles receive more direct sunshine so it has to do with the angle that the light hits. The Earth is round and when light hits it the light wraps around the earth. At the poles the light is very stretched and at the equator it is very direct hence it is hotter at the poles.
Approximately 97.5% of the earths water is salt water (saline), and 2.5% is fresh water hope this helps.
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When a refugee-receiving country wants to support a rebel group or push for regime change in a neighboring country, the refugee-receiving country can set up border camps, invite international funding, and allow access for a rebel group to recruit, tax, and politicize its cause among refugees.