Everyone needs to breathe to live, including plants and animals. Trees and plants help regulate the carbon cycle. When trees absorb carbon dioxide from the environment, they give back oxygen. When trees are cut down, there is a disruption in the carbon cycle and there is no exchange of both oxygen and carbon dioxide, which causes a spike in carbon dioxide levels. When this happens, carbon dioxide moves into the atmosphere and is stored there as a greenhouse gas. “However, deforestation still remains the second largest cause of greenhouse gas emissions, just after industrial emissions” (Culas). Greenhouse gases disturb the normal regulation of weather. Problems occur when the greenhouse captures and stores heat. When levels of greenhouse gas carbon dioxide increase, atmospheric conditions become unstable, causing global warming. Global warming is the increase in the earth's temperature, mainly caused by the greenhouse effect. Global warming comes about by affecting the environment by causing droughts, floods, ecosystem changes, less available fresh water, and other environmental problems. Trees play an important role not only in maintaining rich soil, regulating the water table, providing a stable ground anchor to reduce soil erosion, and providing nutrient-rich soil for agriculture, but they also help to absorb carbon emissions into the atmosphere..