Question 1: What is the approximate variation in CO2 concentration each year? Need Assignment Help?
Question 2: Notice that the concentration of CO2 in the atmosphere reaches its highest point at the same time each year. (a) During which time of year does CO2 reach its highest point? Consult Figure 24-8 (b) What explains the timing of the annual fluctuation in CO2? (Hint: Think about the process of photosynthesis and plant respiration, and the locations of large forests on Earth.)