Glaciers, Polar Ice Caps, Sea Ice, and Icebergs

Glaciers

"Glaciers begin to form when snow remains in the same area year-round, where enough snow accumulates to transform into ice."

Polar Ice Caps

"Polar ice caps form because high latitude regions receive less energy in the form of solar radiation from the sun than equatorial regions, resulting in lower surface temperatures."

Floating Sea Ice

"As the ocean water begins to freeze, small needle-like ice crystals called frazil form. These crystals are typically 3 to 4 millimeters (0.12 to 0.16 inches) in diameter. Because salt doesn't freeze, the crystals expel salt into the water, and frazil crystals consist of nearly pure fresh water."

Icebergs

"Icebergs form when chunks of ice calve, or break off, from glaciers, ice shelves, or a larger iceberg. Icebergs travel with ocean currents, sometimes smashing up against the shore or getting caught in shallow waters."

"When mountain glaciers melt the run off water can be an important source of freshwater…"

"…It is actually located further north of the island, on a huge sheet of sea ice in the middle of the Arctic Ocean" and "There is no land under that ice, only frigid salt water."

"Sea ice is not as salty as the ocean water beneath it because when the water freezes, the tiny particles of salt are pushed out of the ice." 

"Since the snow that formed the ice that becomes an iceberg was mostly clean and pure, and since it is fresh water, some people have thought about using icebergs as a resource for human needs."

Glaciers are freshwater and that usually means that it can be used as a freshwater source.

Humans cannot drink salt water because it would make them dehydrated, which is bad.

Yes, humans can drink sea ice (if it's melted) because if you melt it then it becomes mostly fresh water."

We could probably use icebergs for human needs for a while if we have the money because it is fresh water.