1.   Berkovitz said the haze will be short-lived.

2.   But haze is far from intangible, and it inflicts real costs on people and the environment.

3.   But they said the haze could have been a factor.

4.   Does this mean the haze is gone?

5.   Flores said Mexico has so many problems with toxic wastes and severe air and water pollution that the haze in Big Bend is not a high priority.

6.   Haze is a usual part of hot, humid weather.

7.   Haze is not just pollution, as it occurs even in the cleanest environments of the polar regions.

8.   Haze is vague and hard to draw.

9.   He said death certificates that come in later this summer might reveal whether the haze is to blame for untimely deaths.

10.   Stock said the haze is worse at sunrise and sunset, in the summer and when the air is humid.