<span>Oligarchy</span><span>
We can be sure that ancient civilizations knew of and were concerned about infectious diseases from several facts. The hunter gatherers rarely suffered from water borne diseases. They knew that the water that stank or did not taste well was not good to intake. Their main knowledge came from experience. During the Greek period several doctors like Alcmaeon of Croton were mentioned and hence they must have had the knowledge about infectious diseases like Cholera. Several other infectious disease treatment have also been mentioned during the Greek period. </span>
Answer: B
Explanation: Convince people that pesticides do much more harm than good.
<span>Although it is popularly believed that the German army was the first to use gas it was in fact initially deployed by the French. In the first month of the war, August 1914, they fired tear-gas grenades against the Germans. </span>
It was how Earth Day came to be celebrated and was how things like the Clean Water Act, the Clean Air Act, the Endangered Species Act were passed and the Environmental Protection Agency was created to help clean up chemical waste and any other pollutants. Obviously without these things we’d have a huge problem and we depend on them greatly if you think about it.
