humam impact the physical environment in many ways : overpopulation,pollution,burning fossile fuel, and deforestatio.change like these have triggered climate change,soil erosion,poor air quality and undrinkable water
earth climate has been stable for the past 12,000 year. this stability has been crucial for the development of modern civilization .A stable climate enabled human to pursue agrculture ,domesticate animal,settle dowm and develop cultural
Germany's resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson's decision to lead the United States into World War I.
