During the day, plants use CO2 from the atmosphere to prepare food and energy through BLANK. These plants also release CO2. Animals of the
biosphere take in BLANK and give out CO2. When plants and animals
release waste products or BLANK and decompose, carbon is returned to the BLANK
Water-based plants use BLANK CO2 for photosynthesis. During respiration,
aquatic BLANK releases CO2 back into the water. When the BLANK heats the
waters of the oceans and seas, the water releases CO2 into the BLANK
When a large number of dead organisms are buried underground, they can turn into
BLANK fuels, including coal, BLANK, and natural BLANK.
Plants use CO2 for photosynthesis. However, living organisms replenish it through
their BLANK.