192678
With the United States ( 36.1 per cent share of developed-world carbon dioxide ) and Australia refusing ratification , Russia 's agreement ( 17 % of global emissions in 1990 ) was required to meet the ratification criteria and therefore Russia could delay the process .
 United States, Australia, Russia, Russia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United States, Australia, Russia, Russia