1.   Beneath the noxious haze covering much of Brazil every burning season is an opaque, often contradictory, government policy toward the environment.

2.   A generation of rag-pickers settled in shanties atop Smokey Mountain, named for the noxious haze pumped out by methane fires smoldering beneath the refuse.

3.   All kinds of vehicles pump pollutants that cover the city in a noxious haze.

4.   The air quality has recently been good or moderate, providing relief from the noxious haze caused by forest fires burning out of control in neighboring Indonesia.