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Zany ideas to slow polar melting are gathering momentum
Giant curtains to keep warm water away from glaciers strike some as too risky
Most of this rise is a consequence of water physically expanding as it warms, but in recent decades meltwater flowing off Greenland and Antarctica has significantly contributed too. Rising seas not only erode or flood land, they also let destructive storms reach ever farther inland. As melting polar ice becomes an ever more important contributor to sea-level rise, some have begun to embrace the notion that it could be slowed by technological means ranging from underwater curtains to ice-thickening pumps.
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