In the years since the city of London imposed strict air-pollution regulations on local industry, the number of bird species seen in and around London has increased dramatically. Similar air-pollution rules should be imposed in other major cities.
Each of the following is an assumption made in the argument above EXCEPT:

Question

Examsnet · Accepted Answer

Correct Answer is :  In most major cities, air-pollution problems are caused almost entirely by local industry.

GMAT Verbal Reasoning Practice Test 2