GEOLOGY

Detailed explanation-1: -During Northern Hemisphere spring and summer months, plants absorb a substantial amount of carbon dioxide through photosynthesis, thus removing it from the atmosphere and change the color to blue (low carbon dioxide concentrations).

Detailed explanation-2: -During the day or in spring and summer, plants take up more carbon dioxide through photosynthesis than they release through respiration [1], and so concentrations of carbon dioxide in the air decrease.

Detailed explanation-3: -As plants begin to photosynthesize in the spring and summer, they consume CO2 from the at-mosphere and eventually use it as a carbon source for growth and reproduction. This causes the decrease in CO2 levels that begins every year in May. Once winter arrives, plants save en-ergy by decreasing photosynthesis.

Detailed explanation-4: -There’s more carbon dioxide in the winter and a bit less in the summer. That’s the collective breathing of all the plants in the Northern Hemisphere. “Plants are accumulating carbon in the spring and summer when they’re active, and they’re releasing carbon back to the air in the fall and winter, ” Graven explains.

Detailed explanation-5: -Levels of carbon dioxide in the atmosphere rise and fall each year as plants, through photosynthesis and respiration, take up the gas in spring and summer, and release it in fall and winter. Now the range of that cycle is expanding as more carbon dioxide is emitted from burning fossil fuels and other human activities.