3078
Perhaps most significant in the species ' recovery , in 1972 , DDT was banned from usage in the United States due to the fact that it inhibited the reproduction of many birds .
 location: United States
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: United States