How do plants and animals influence air composition?

Plants and animals influence air composition through processes like photosynthesis, respiration, and decomposition.

Plants play a crucial role in maintaining the balance of gases in the atmosphere. Through the process of photosynthesis, they absorb carbon dioxide and release oxygen. This process not only helps in reducing the levels of carbon dioxide, a greenhouse gas, but also contributes to the oxygen content of the air, which is essential for the survival of most organisms. Additionally, plants also release water vapour into the air through transpiration, contributing to the humidity and overall moisture content of the atmosphere.

On the other hand, animals, including humans, influence the air composition primarily through the process of respiration. In this process, oxygen is inhaled and used to break down glucose, producing carbon dioxide as a by-product, which is then exhaled. This contributes to the carbon dioxide content of the atmosphere. Moreover, the decomposition of dead plants and animals also releases gases like methane and nitrous oxide, both of which are potent greenhouse gases.

Furthermore, certain animals, particularly ruminants like cows and sheep, produce methane as a by-product of their digestive processes. This methane is released into the atmosphere and contributes to the overall greenhouse gas emissions. Similarly, the waste produced by animals, particularly in large-scale farming operations, can release significant amounts of methane and nitrous oxide when it decomposes.

In conclusion, both plants and animals have a significant impact on the composition of the air. While plants help in reducing carbon dioxide levels and increasing oxygen content, animals contribute to the levels of carbon dioxide, methane, and nitrous oxide. Understanding these processes is crucial for managing and mitigating the impacts of climate change.