AP BIOLOGY

Detailed explanation-1: -Deforestation can result in more carbon dioxide being released into the atmosphere. That is because trees take in carbon dioxide from the air for photosynthesis, and carbon is locked chemically in their wood. When trees are burned, this carbon returns to the atmosphere as carbon dioxide.

Detailed explanation-2: -Trees also release carbon dioxide to the atmosphere as a function of their physiology. When some or all parts of a tree decompose after death or burn during fire, the carbon is released back to the atmosphere.

Detailed explanation-3: -When forests are cleared or burnt, stored carbon is released into the atmosphere, mainly as carbon dioxide. Averaged over 2015-2017, global loss of tropical forests contributed about 4. 8 billion tonnes of carbon dioxide per year (or about 8-10% of annual human emissions of carbon dioxide).

Detailed explanation-4: -Through a process called photosynthesis, leaves pull in carbon dioxide and water and use the energy of the sun to convert this into chemical compounds such as sugars that feed the tree. But as a by-product of that chemical reaction oxygen is produced and released by the tree.

Detailed explanation-5: -When forests burn, vast amounts of the stored carbon is emitted; but, when vegetation in burned areas regrows, it draws this carbon back out of the atmosphere. This is part of the normal fire-recovery cycle.