According to researchers from the UK Met Office and University of Exeter, the Earth may experience one of the largest increase in atmospheric carbon dioxide this year. The forecast is based on a number of factors like rising anthropogenic emissions and reduction in the uptake of carbon dioxide by ecosystems. Over the years, human emissions have increased. Other sources include emissions from fossil fuels, deforestation and cement production. scientists also state that the emissions would have been far greater if it were not for the natural carbon sinks which soak up some of the excess CO2.