1.   And how long will Asians tolerate the fact that the economic boom has left them with five of the seven most polluted cities in the world?

2.   Further, the long U.S. boom has left most American banks with strong enough balance sheets to absorb a loss or two in Asia.

3.   On the other hand, the boom in tourism leaves little room for growth.

4.   That boom left such a glut of workers that for years new opportunities in the field were almost nonexistent.

5.   The long boom has left the Valley under strain.

6.   They point out that the development boom has left the U.S. with too much retail space.

7.   A building boom has left Shanghai with a surplus of empty office space and luxury apartments, forcing down rents and sale prices.

8.   The illegal immigrants come because an economic boom has left Malaysia with a labor shortage.