in big cities is a big issue

blizzy

Member
Joined
Mar 12, 2017
Member Type
Student or Learner
Native Language
German
Home Country
Germany
Current Location
Germany
Can I say this and does is sound natural?
Environmental pollution in big cities is a big issue which Peter is interested in.
Peter really delved into the subject and became quite knowledgeable.
 

Tarheel

VIP Member
Joined
Jun 16, 2014
Member Type
Interested in Language
Native Language
American English
Home Country
United States
Current Location
United States
Can I say these and do they sound natural?
Environmental pollution in big cities is a big issue which Peter is interested in.
Peter really delved into the subject and became quite knowledgeable.

Rather than a big issue you might just say an issue.
 
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