What was the environmental factor MAINLY responsible for the changes which were seen in the graph in Figure 3?

Answer:
my answer
Explanation:
the sun is rising in noon and at it's very height, carbon-dioxide levels are LOW because the more sunlight plants get, THE MORE PLANTS CONVERT SUNLIGHT WITH CARBON DIOXIDE INTO OXYGEN AND REMOVE CARBON DIOXIDE FROM ATMOSPHERE
Answer:
it seems that there aren't any factors that can really support it but i would say that the percent seems to lower because of the temp change
Explanation: