Officials in South Korea are concerned about 
According to the text, the general reaction to the Rio+20 Conference was 
The author of the article believes that immediately after the 1992 environmental conference 
The main aim of the third paragraph is to report on 
The expression "scream blue murder" in paragraph 3 line 7 means 
The main purpose of the text is to 
‘Until I’m blue in the face’ in the fragment “I can stand in front of you and talk about working safely and what procedures to follow until I’m blue in the face.” (lines 1-3) is substituted, without change in meaning, by ‘until I 
The fragment ‘all of you have to come together on this issue, or we’re in trouble.’ (lines 18-19) is understood as a(n) 
The expressions “Complying with” and “follow through” in the fragments “Complying with OSHA regulations isn’t always easy,” (lines 10-11) and “Then it’s up to you to follow through the task and use the equipment as you were trained.” (lines 23-24) may, respectively, be substituted, without change in meaning, by 
The pronoun “those” in the sentence “Our hopes are that you won’t find too many of those around here.” (lines 32-33) refers to 