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Este Cmap, tiene información relacionada con: world population 4ª eval, World population Figures until 17th Century, World population Distribution Densely populated areas, 18th Century Growth rate increased. Technical improvements in agriculture and industry., World population Figures 20th Century, World population Distribution Sparcely populated areas, Sparcely populated areas Hot or cold areas. Little or abundant rain., Densely populated areas Plenty of water Necessary for survival and economic growth., Population growth was very slow. Birth rate was high People died from hunger and epidemics., World population Figures 18th Century, Technical improvements in agriculture and industry. Life expentancy increased. Advances in medicine., Densely populated areas Temperate climate Temperatures mild and rain is plentiful, but not excessive., Densely populated areas Valleys and plains Areas with fertil soil, so good for agriculture, build- ing and communi- cations., Densely populated areas Sources of energy Minerals or petroleum., 20th Century Demographic explosion. Population quadrupled., until 17th Century 6500 million inhabitants. Population growth was very slow.