GEOG-130 Lecture Notes - Lecture 9: Penicillin, World War I
16 Oct 2020
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Document Summary
Prior to 8,000 bc population was fairly constant. In 8,000 bc - 5 million was the population. In 1750 ad - 800 million was the population: growth rate of . 5% per year. The invention of agriculture had a huge impact on population. This provided people with more food and the constant supply of it. It was the beginning of urbanization; people were more settled, less nomadic. Medical revolution: the invention of antibiotics (penicillin) prevented people from dying from common infectious diseases, growth rate 2. 9 per year. It is projected that by 2030, 60% of world"s population will live in a city, and by 2050, 70% will. In 1945, only four megacities existed (10 million or more people). By 2030, there is projected to be close to 25 megacities in the world. Cbr - total number of live births per 1,000 people per year.
