Atmospheric scientists warn that greenhouse gas emissions are increasing more rapidly, despite global efforts to curb the use of fossil fuels, new research by Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO) shows.
Taking this information on board could mean temperature increases of 1.6 to 6 degrees Celsius - and the higher temperatures are more likely, they said in a statement.
Rajendra Pachauri, the chair of the UN-run Intergovernmental Panel on Climate Change (IPCC) has said that eating less meat is a good way to reduce damage to the climate.