112101
Studies conducted by the NOAA also suggest a 2 °C increase in global temperatures will lead to a greater proportion of tropical storms that reach Category 4 and Category 5 levels .
 NOAA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 NOAA