HST 121 Lecture : HST 121 Notes (9/9/14).docx
Document Summary
Climate change and plague: climate, microbes and history. Hst 121 notes: global history to 1750: environments, plants, and animals can affect historical change, they impact conditions for human chance as well. Climate and microbes can resist human power. Natural catastrophes can have irreversible effects on society. They can have psychological impacting an entire society. Plagues can kill millions, disrupt commerce and a healthy economy: climate changes: three levels o. Long term reduction of temperature that leads to glaciers and polar seas. Causes: atmospheric composition, earth"s orbit cycles, what"s happening underneath, and the sun"s output: global warming. Rise in the average temperature, retreats of glaciers and ice sheets. Causes: human influence, deforestation, carbon emissions: sudden interruptions. Rats were the issue: genoese traders and soldiers came into contract with mongols in crimean, biological warfare o. 75 million people killed: what is plague, forms of plague. Caspian sea, ural mountains, volga mongolia, trans balkans.
