It only takes a few days for a body left outside to be reduced to bones.
The odor from a decomposing body lessens after stage 3 (active decay) of decomposition.
Insects and bacteria are the main decomposers involved in the decomposition process.
It can take weeks or months to reach stage five (dry) of decomposition.
The gases created during stage 2 (bloat) of decomposition are created by bacteria already existing in an individuals digestive tract.