There has been a downward trend in the United States since 1980 in the ambient concentrations of
a. sulfur dioxide.
b. carbon monoxide.
c. lead.
d. all of the above.
d
Economics
You might also like to view...
Wage and price stickiness
A. give rise to a vertical long-run aggregate supply curve. B. give rise to a vertical short-run aggregate supply curve. C. creates a surplus or a shortage of real GDP. D. prevents the economy from producing its potential level of real GDP.
Economics
If the marginal propensity to consume is 0.6, the marginal propensity to save is
A) 0.4. B) 0.6. C) 1. D) 1.5.
Economics