As levels of greenhouse gases reach a new record, concerns are growing about the role of China in global warming. For years, the increase in the number of Chinese coal-fired power stations has been criticised. Now environmental groups say China is also backing dozens of coal projects far beyond its borders.
Coal is the most damaging of the fossil fuels because of the quantity of carbon dioxide it releases when it's burned. Last year, the concentration of carbon dioxide in the atmosphere reached its highest level for the past 3-5 million years, according to the latest research by the UN's weather agency, the World Meteorological Organisation (WMO).