A problem with growing produce on our roofs is the quantities of soil needed, whichwould add unfeasible amounts of weight. Is it safe to say that "which" does not refer to "soil needed" only; it refers to "the quantities of soil needed"?
Top answer
That is how I understood it the first time through. I'll let my colleagues debate the specifics.
— Philip
That is how I understood it the first time through.
I'll let my colleagues debate the specifics.
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