"There are many units by which to measure the impact of climate change."
Does the above sentence grammatical?
However, I wonder if "metrics" might not be a better choice than "units."
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
There are many units by which to measure the impact of climate change
I wonder why we need 'by which' in the above sentence.
I understand the sentence as 'There are many units to measure the impact of climate change'.
Is 'by which' a 'preposition + relative pronoun' in the sentence?
If then what is the precedence of which?
Last edited by wotcha; 11-Aug-2012 at 15:30.
NOT A TEACHER
The most important thing is that you understand it correctly. I don't know if I can explain it well, but "which" refers back to "units". "By" is used because you measure something by something. Education shouldn't be measured purely by examination results. (Source: Longman).
'Many units are there to measure the impact of climate change by which ( = by many units) '
I've learned and taught relative pronoun always comes before a clause, so I was pretty much confused
when I first came across the sentence. As Gillnetter said, however, I might understand it
as a new pattern of composition.
Last edited by wotcha; 12-Aug-2012 at 08:07.