1.   Arizona is one of the last states to sell leaded gasoline.

2.   As important, emissions from leaded gasoline were concentrated in urban areas, while emissions from the battery life-cycle would be focused near smelters and recyclers.

3.   Because the fact of the matter is that the personal letter is dead, having gone the way of lace valentines, slide rules and leaded gasoline.

4.   But a new study shows the knock on leaded gasoline might not have been wholly deserved.

5.   But with leaded gasoline nearly eliminated, most often now the source is paint.

6.   Early this year, for example, Squaw Peak Exxon in Phoenix pumped its last leaded gasoline.

7.   Emissions from the burning of high-sulfur coal and leaded gasoline dusted everything with grit.

8.   Far from petering out, demand for leaded gasoline, while shrinking, has remained far stronger than anyone predicted, especially in the Third World.

9.   For years, leaded gasoline was an environmental bad boy, blamed for high atmospheric lead levels in urban areas.

10.   In the distant days of leaded gasoline, bias-ply tires and backyard grease monkeys, engines produced tremendous horsepower while combusting great quantities of fuel.