1.   Increasing amounts of low-level ozone pollution are giving rise to an asthma epidemic among babies and young children, according to a senior government health adviser.

2.   However, there are few if any signs yet that these guidelines and goals are turning the tide in the asthma epidemic.

3.   Other factors have converged with smog to bring about the asthma epidemic, such as home design, a sedentary lifestyle and a diet loaded with fat and preservatives.

4.   Ten years ago, scientists thought diesel exhaust and other pollutants might be causing the asthma epidemic.

5.   Ten years ago, scientists would have agreed with Ms. Garcia that diesel exhaust and other pollutants might be causing the asthma epidemic.

6.   The real culprits in the asthma epidemic.