About what percentage of earth's land surface was covered by glaciers during the quaternary period?

The position on the earth in which a place can be found

Which ecosystem best fits the characteristics listed below? which ecosystem best fits the characteristics listed below? ii. seasonal migrations of millions of wildebeests, zebras, and elephants iii. large numbers of predators, such as lions iv. acacia trees and grasses a. the congo rainforest b. the african mangroves c. the serengeti grasslands d. the sahel

Fossil fuels such as coal, oil, and natural gas were formed over millions of years by