Final answer:
Greenland's glaciers are melting into the sea twice as fast as previously believed, due to a warming trend caused by global climate change. This contributes to a rise in sea levels and poses a threat to coastal ecosystems and human communities.
Step-by-step explanation:
Greenland's glaciers are melting into the sea twice as fast as previously believed, according to scientific research. This is due to the warming trend caused by global climate change. The increase in temperatures has led to the retreat of glaciers and polar ice, resulting in a rise in sea levels. The melting of glaciers contributes significantly to global sea level rise and poses a threat to coastal ecosystems and human communities.