Rising sea prompts concern about sand replenishment

With global warming threatening to raise sea levels, environmental groups are challenging the wisdom of spending millions of dollars to put sand on area beaches ---- especially if it is only going to wash back out to sea.

The world's oceans rose throughout the last century as the planet gradually warmed and the warmer sea waters expanded, scientists say.

And the melting ice sheets on Greenland and elsewhere are expected to dramatically accelerate the rate of rise between now and 2100.

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