Final answer:
Deforestation for agricultural expansion significantly increases atmospheric carbon dioxide levels, which contributes to the greenhouse effect, global warming, and climate change. This reduction in trees also leads to habitat loss and decreased biodiversity. The release of carbon into the atmosphere during deforestation is a major driver of current environmental challenges.
Step-by-step explanation:
When forests have been cut and burned to raise crops, this activity has several consequences for the Earth's atmosphere. This process, known as deforestation, is directly linked to climate change because it reduces the number of trees available to absorb carbon dioxide (CO2) from the atmosphere through photosynthesis. Additionally, when trees are burned, the carbon stored in them is released back into the atmosphere, contributing further to the greenhouse effect.
Cutting forests and clearing land not only puts more CO2 into the atmosphere by reducing the number of autotrophic organisms (like trees) that facilitate photosynthesis, but also often involves burning, which releases additional CO2 that was previously stored in plants.
Furthermore, agricultural expansion, especially in the tropics, has led to significant habitat loss, endangering countless species and reducing biodiversity. The removal of forests for agricultural purposes and the associated habitat loss is responsible for a dramatic increase in atmospheric CO2 levels, causing global warming and climate change, affecting not just local ecosystems but global temperature and weather patterns as well.