1. Peat bogs store large amounts of carbon in the partially decayed plant matter.
2. When peat is burned as fuel, this stored carbon is released into the atmosphere as carbon dioxide (CO₂).
3. Draining the bogs exposes the remaining peat to oxygen, allowing decomposers to break it down, which also releases CO₂ (and methane).
4. Carbon dioxide is a greenhouse gas, which traps heat (infrared radiation) in the atmosphere, leading to an increase in the Earth's temperature (global warming).
Peat bogs are significant carbon sinks, meaning they store more carbon than they release. This carbon is locked away in the organic matter that has built up over thousands of years due to the anaerobic (low oxygen) and acidic conditions preventing decomposition.
When humans destroy these bogs, this stored carbon is released.
1. **Combustion:** When peat is dried and burned as fuel, the carbon reacts with oxygen, releasing large amounts of carbon dioxide (CO₂), a greenhouse gas.
2. **Decomposition:** Draining the bog exposes the remaining organic matter to air (oxygen). This allows aerobic decomposers to thrive and break down the peat, releasing CO₂ through respiration. Methane (CH₄), another potent greenhouse gas, can also be released.
These greenhouse gases accumulate in the atmosphere. They absorb and re-radiate infrared radiation (heat) that would otherwise escape into space. This process, known as the enhanced greenhouse effect, leads to a gradual increase in the average temperature of the Earth's atmosphere, contributing to global warming and climate change.
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