Answer to Question 1
The use of catalytic converters in cars has reduced emissions dramatically. In addition, new cars sold in 1994 were required to emit 30 less VOCs and 60 less nitrogen oxides. In 1992, oxygen began to be added to gasoline to reduce carbon monoxide emissions. After 1990, inspections began to be required for measuring emissions. Finally, CAFE standards have set fuel economy standards for motor vehicles.
Answer to Question 2
See Figure 8-23 for an explanation of the demographic transition with examples of countries currently going through each phase (Afghanistan, Uganda, Zambia, Ghana, Guatemala, Iraq, India, Gabon, Malaysia, Brazil, Germany, and Japan).
Major moons of Uranus in order of increasing distance (left to right), at their proper relative size
Major parts of the cell and the structures located inside the cell.
Major Categories of Long-Term Memory
The introduction of a new generation of electric and hybrid cars will reduce the demand for oil
Layers and Major Structures of the Skin