Multiple Choice
The two main gases making up the lower atmosphere are
A) helium and hydrogen.
B) carbon dioxide and nitrous oxide.
C) oxygen and methane.
D) nitrogen and oxygen.
E) oxygen and carbon dioxide.
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q1: When cool,dry air sinks from the upper
Q2: As far as we are currently aware,who
Q3: Which of these is true about ways
Q4: What are the ecological implications of global
Q6: The change in ocean temperatures brought on
Q7: _ means that net-greenhouse gas emissions are
Q8: The "Keeling curve" showing CO<sub>2</sub> measurements at
Q9: An increase in albedo would mean there
Q10: _ stated that signatory nations must reduce
Q11: There has been an increase in frequency