Guardian: The Earths climate is changing in fact, it always changes. But in the current context of human influence, scientists try to decipher how much of the change is natural compared to human-induced.
One clear way humans influence the Earth is through the biosystem. For instance, farming changes the biosystem. By removing natural growth and planting annual crops that are harvested, we change the system in a way that could in turn affect other parts of the Earth system. In addition, the use of nitrogen...