Global ice melt and sea-level rise are events that scientists are still struggling to understand. One of the most unconventional theories is that the increase in temperatures worldwide could result in a new ice age, rather than in overheating.

The logic supporting the concept of a new ice age involves currents. Currents are continuous, directed movements of ocean water. They are caused by a number of factors, including wind and the rotation of the earth. They are also affected by differences in temperature and salinity (or salt content).

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