9534
The authors address concerns relating to increasing uranium ( U ) concentrations ( from 12 micro g / L to 2 mg / L ) in the freshwater ecosystem caused by anthropogenic activities .
 Chemical: uranium; Chemical: U
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: uranium; Chemical: U