Biology 2485B Chapter Notes - Chapter 8: Subsistence Agriculture, Fertile Crescent, Rangeland
18 Feb 2018
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The race to feed the world + impacts of the green revolution: we need land to grow most of our food. Evidence from archaeology and paleoecology suggests that agriculture was invented independently by different cultures in at least four and possibly 10 or more areas of the world at around the same time. Different ways we have obtained food over time / proportion of people who relied on the food. 12 000 years ago hunters and gatherers (dependent on plants and animals) Advancements in agriculture and growth of human population size creates a positive feedback: Increases carrying capacity: we are now dependent on agriculture to support the human population, population has gotten so large that we are now dependent on intensification. The ability to grow excess farm produce enabled people to leave farming to live off the food that others produced.
