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Global warming poses further serious risks , and a study by the OECD has estimated that 5.138 " million people in Bangkok may be exposed to coastal flooding by 2070 , the seventh highest figure among the world 's port cities .
 OECD, Bangkok
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 OECD, Bangkok