Read the passage about Dr. John Snow. In 1849, doctor John Snow began to question the long-held beliefs that disease was caused by “bad air.” When a cholera epidemic broke out in London, he interviewed residents of the hardest-hit areas. He mapped cases of the disease and determined that they were centered around a particular water pump. To test his theory that contaminated water was to blame, he convinced local leaders to disable the pump by removing the pump handle. The outbreak came to an end. What was Dr. Snow’s hypothesis? Cholera was caused by “bad air.” Cases were centered around a water pump. Contaminated water caused cholera. Leaders should disable the water pump.

1.in which of the following ways did washingtons native people produce a minimal impact on their environment? select all that apply -built fish traps across rivers -harvested bark from trees -dammed rivers, altering salmon runs -logged old growth forests-filled in swamps-burned forested areas to increase plant diversity -tore down hills to make cities 2. which statement about groups interacting with the environment is true? a. settlers were careful not to affect the environment with their actions b. settlers were particularly concerned with conserving forest c. native people tried to balance their use of natural resources with their respect for the environment d. native people were careful not to affect the environment with their actions 3. which best explains how native americans in washington related to the environment? a. their dependence upon the environment led to over-harvesting, which used up many natural resources b. they did not fully take advantage of natural resources until settlers arrived from the eastern united states c. they relied on the environment for all aspects of their lives-clothing, food, housing, and transportation. d. they worked over the years to become less reliant on natural resources for their livelihood. 4.what is one way farmers in eastern washington changed their natural environment? a. damming of rivers b. excessive trapping c. irrigating crops d. logging old growth forests 5. how do people in washington interact with the environment today? select all that apply. -eastern washington is no longer used for farming -logging remains a big industry within the state -rivers are reserved for recreational use -people rely solely on cedar for building canoes -people rely on the rich farmlands of western washington for many crops