The carbon cycle describes how carbon moves between the atmosphere, living organisms, oceans, and rocks. Carbon dioxide in the air is the starting poi
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Why is an increase in atmospheric CO2 a problem if plants need it for photosynthesis?
While plants do use CO2, excess CO2 acts as a greenhouse gas, trapping heat in the atmosphere and warming the planet. Climate change is disrupting ecosystems faster than organisms can adapt. Additionally, not all plants are benefiting equally.
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How does carbon in the soil become part of the carbon cycle again?
Soil organisms decompose organic matter, releasing carbon dioxide. Plants grow in soil and absorb carbon dioxide from the air, not directly from the soil. Soil carbon becomes available when it is fully decomposed to CO2.
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What is the difference between the carbon cycle and the carbon footprint?
The carbon cycle is the natural process of carbon movement. Carbon footprint is the total carbon dioxide an activity releases, measuring human impact on the cycle. Reducing carbon footprint means reducing human disruption of the natural cycle.
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