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# A potent Greenhouse gas methane is formed in the environment from

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Intern
Joined: 02 Jun 2013
Posts: 18
A potent Greenhouse gas methane is formed in the environment from  [#permalink]

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07 Jul 2014, 15:36
00:00

Difficulty:

5% (low)

Question Stats:

80% (00:55) correct 20% (01:06) wrong based on 103 sessions

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A potent green house gas, methane is formed in the environment from carbon dioxide and hydrogen , two major gases present in marshlands , are oxidized by bacteria

A) methane is formed in the environment from
B) methane is formed in the environment when
c) methane is formed in the environment and when
d) methane, formed in the environment from
e) methane, formed in the environment when
Senior PS Moderator
Joined: 26 Feb 2016
Posts: 3248
Location: India
GPA: 3.12
Re: A potent Greenhouse gas methane is formed in the environment from  [#permalink]

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22 Aug 2017, 06:01
A) methane is formed in the environment from
B) methane is formed in the environment when
c) methane is formed in the environment and when
d) methane, formed in the environment from
e) methane, formed in the environment when

Option B corrects the errors in the original sentence by using when.
The meaning becomes clearer as "x happens when y"
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Re: A potent Greenhouse gas methane is formed in the environment from   [#permalink] 22 Aug 2017, 06:01

# A potent Greenhouse gas methane is formed in the environment from

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