Question
Question: CO<sub>2</sub> content of atmosphere has increased in the last 150 years from...
CO2 content of atmosphere has increased in the last 150 years from
A
25 to 35 ppm
B
270 to 340 ppm
C
0.027 to 0.34 ppm
D
0.2 to 0.3 ppm
Answer
270 to 340 ppm