In contrast, nearly all climate scientists agree that the climate changes we are seeing today are caused by human activities, especially Deforestation and forest fires and these activities are having serious negative effects on our planet.Deforestation has been responsible for more than 20% of carbon dioxide emissions, and forest fires are also a major cause of a large amount of greenhouse gas emissions globally, causing about 5 to 8 percent of all premature deaths annually.Climate change leads to many negative impacts on the environment, such as deforestation and degradation of greenhouse gas emissions into the atmosphere through the burning of forest biomass and the decomposition of remaining plant material and soil carbon.Also, environmental pollution can affect forests and lead to tree damage and death.