During the late 1800's, sanitation and hygiene were taken care of very well, and diseases spread throughout cities. Specifically, in the city of New York, 40,000 people died from these diseases.
After Exxon Valdez oil spill, eleven thousand workers attacked the issue using high water pressured hoses and shovels to clean the beaches and rocks. The animals were taken care of, clean, and released back into the wild.
Conservationists strive to exceed outcomes in the past, setting new goals; their success can be proven from the usage of the Antiquities Act, preserving endangered species, and confronting water pollution. Presidents in the past have utilized the Antiquities Act to their advantage, creating national monuments, preventing the land and resources from being extracted.