Final answer:
Livestock, especially cows, are not considered climate neutral because they produce methane during digestion, which is a potent greenhouse gas.
Step-by-step explanation:
The main reason why livestock, particularly cows, are not considered climate neutral is because they produce methane during digestion, and methane is a potent greenhouse gas.
Methane has a much higher global warming potential than carbon dioxide, meaning it has a stronger warming effect on the atmosphere.
Livestock farming, including cattle farming, is responsible for a significant amount of methane emissions, contributing to global warming.