Scientific evidence indicates that the CO₂ added to the air by the burning of wood and fossil fuels is contributing to global warming, a rise in global temperature. Tropical rain forests are estimated to be responsible for approximately 20% of global photosynthesis, yet the consumption of large amounts of CO₂ by living trees is thought to make little or no net contribution to reduction of global warming. Why might this be? (Hint: What processes in both living and dead trees produce CO₁ ?)

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08-09-2022
Biology

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Scientific evidence indicates that the CO₂ added to the air by the burning of wood and fossil fuels is contributing to global warming, a rise in global temperature. Tropical rain forests are estimated to be responsible for approximately 20% of global photosynthesis, yet the consumption of large amounts of CO₂ by living trees is thought to make little or no net contribution to reduction of global warming. Why might this be? (Hint: What processes in both living and dead trees produce CO₁ ?)

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SidHussain SidHussain · Answer 1 · 2022-09-21T01:07:03+02:00

The consumption of large amounts of CO₂ by living trees is thought to make little or no net contribution to the reduction of global warming due to the process of cellular respiration.

In plants, carbon dioxide is taken in from the atmosphere for the process of photosynthesis to occur. This intake of carbon dioxide is however not enough to reduce the effects of global warming because plants also release carbon dioxide during the process of cellular respiration.

Cellular respiration is the process in which the cells make carbon dioxide and water from glucose and oxygen. ATP is produced as a result of cellular respiration which is the driving force for all activities in a cell. Hence, although trees are consuming carbon dioxide during photosynthesis, they are also releasing carbon dioxide during cellular respiration.

When trees die, the decomposition process also releases carbon dioxide into the atmosphere. Hence, the consumption of carbon dioxide is thought to make little or no contribution to global warming.

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