7157
The increasing use of titanium dioxide nanoparticles ( nTiO ( 2 ) ) inevitably results in their release into the environment , raising concerns about potential adverse effects in wildlife .
 titanium dioxide, nTiO ( 2 )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 titanium dioxide, nTiO ( 2 )