Population Pressure: Land and Water is the second chapter written by author Lester R. Brown in his book Plan B: Mobilizing to Save Civilization. In this chapter he talks about Civilization's foundation eording, water tables falling, farmers losing water to cities, land and water conflicts, cars and people compete for grain and the rising tide of environmental refugees. During this century we must deal with effects of trends-- rapid population growth, advancing deserts, and rising seas--that we set in motion during the last century. Our choice is simple one: " Revese the trends or risk being overwhelemed by them."