Context: Glacial ice is the largest reservoir of freshwater on Earth. Many glaciers from temperate, alpine and seasonal polar climates store water as ice during the colder seasons and release it later in the form of meltwater as warmer summer temperatures cause the glacier to melt, creating a water source that is especially important for plants, animals and human uses when other sources may be scant. Within high altitude and Antarctic environments, the seasonal temperature difference is often not sufficient to release meltwater.

Question: Do Earth's lakes or glaciers hold the most freshwater?
Answer: glaciers

Question: What causes glaciers to release meltwater?
Answer: warmer summer temperatures

Question: In which area are summer temperatures not high enough to release meltwater from glaciers?
Answer: Antarctic environments

Question: Under what circumstances would humans require water from a glacier?
Answer: when other sources may be scant

Question: Where is all the fresh water on earth contained?
Answer: Unanswerable

Question: What glaciers often release place during warm periods?
Answer: Unanswerable

Question: What creates in important water source for many plants and animals but not humans?
Answer: Unanswerable

Question: Who benefits from the Antarctic's meltwater?
Answer: Unanswerable