Unit One Before Reading Global Reading Detailed Reading After Reading Man in the Realm of Nature Zooming In: An Integrated English Course- Electronic Teaching Portfolio Directions: Read the following poster. Can you understand what About the author the poster means? What information can you learn Alexander Spirkin from it? How do you feel after reading the poster? Dialectical materialism The world's water supply Read and Think If all earth's water fit in a gallon jug, Environmental Issues available fresh water would equal ust over a tablespoon -less than Group discussion half of one percent of the total about 97 percent of the planets water is seawater; another two percent is ocked in icecaps and glaciers. Vast reserves of fresh water underlie earth' s surface, but much of it is too deep to economically tap 新世纪大学英语系列教材综合教程子ODirections: Read the following poster. Can you understand what the poster means? What information can you learn from it? How do you feel after reading the poster? About the Author Alexander Spirkin Read and Think Environmental Issues Group Discussion Dialectical Materialism The world’s water supply If all earth’s water fit in a gallon jug, available fresh water would equal just over a tablespoon — less than half of one percent of the total. About 97 percent of the planet’s water is seawater; another two percent is locked in icecaps and glaciers. Vast reserves of fresh water underlie earth’s surface, but much of it is too deep to economically tap