GEOLOGY

Detailed explanation-1: -There is still some uncertainty about the full volume of glaciers and ice caps on Earth, but if all of them were to melt, global sea level would rise approximately 70 meters (approximately 230 feet), flooding every coastal city on the planet.

Detailed explanation-2: -Global sea levels are rising as a result of human-caused global warming, with recent rates being unprecedented over the past 2, 500-plus years. Sea level rise is caused primarily by two factors related to global warming: the added water from melting ice sheets and glaciers, and the expansion of seawater as it warms.

Detailed explanation-3: -Greenland and Antarctica contain giant ice sheets that are also considered glaciers. As temperatures rise, glaciers melt faster than they accumulate new snow. As these ice sheets and glaciers melt, the water eventually runs into the ocean, causing sea level to rise.

Detailed explanation-4: -If the Antarctic Ice Sheet melted entirely, it would raise global sea levels by around 200 feet (60 meters).

Detailed explanation-5: -During the last ice age glaciers covered almost one-third of Earth’s land mass, with the result being that the oceans were about 400 feet (122 meters) lower than today. During the last global “warm spell, ” about 125, 000 years ago, the seas were about 18 feet (5.5. meters) higher than they are now.