It is found that climate change due to global warming can affect allergies. Global warming and increased atmospheric carbon dioxide levels from burning fossil fuels can increase the levels of pollen that cause allergies. The effect of global warming and increased carbon dioxide levels on allergies are currently being studied by government agencies, scientists, and doctors. The Intergovernmental Panel on Climate Change and the Environmental Protection Agency have both cited increased allergic reactions due to climate change as a growing concern for the public in 2007 reports.