An increase in atmospheric CO2 concentrations will most likely lead to __________ in the
troposphere and __________ in the upper atmosphere.
a. warming, warming
b. cooling, warming
c. warming, cooling
d. cooling, cooling
Question 2It appears that, as the number of sunspots increases, the sun's total energy output:a.
increases slightly
b. decreases slightly
c. begins to alternately increase and decrease above average values
d. does not change