1.   Gore said that Houston was overtaking Los Angeles as the city with the worst smog in America.

2.   In Los Angeles, air quality has been steadily improving but the region still has the worst smog in the country.

3.   In the past two years Houston has competed with Los Angeles for the dubious distinction of being the city with the worst smog problem in the nation.

4.   This long, hot summer has produced one of the worst smog seasons in years for the Northeastern United States.

5.   Last summer, for the first time, Houston overtook Los Angeles for having the worst smog.

6.   Prince Philip ducked out of the royal party Saturday to visit a command post for firefighters who recently battled the worst smog in Bruneian history.