text: Coal will probably rival oil as the world’s biggest source of energy in the next five years. This might be a disaster for the climate. 
  One of the biggest reasons behind the rise in coal use is the big increase in the use of shale gas in the US. 
  New research from the International Energy Agency (IEA) shows that all over the world people are using more coal, except in the US, where shale gas is now more popular than coal. Because the US is using less coal, coal prices across the world have reduced. This has made coal more attractive, even in Europe. 
  Maria van der Hoeven, Executive Director of the IEA, said that the amount of coal we use “continues to grow each year and, if no changes are made, coal will catch oil within ten years.” 
  Coal is available in large amounts and it can be found in most regions of the world, unlike oil and gas, and it is cheap to extract. The IEA says that China and India will drive world coal use in the next five years, and India will probably overtake the US as the world’s second biggest consumer. China is the biggest coal importer, and Indonesia is the biggest coal exporter. 
  According to the IEA’s Medium-Term Coal Market Report, the world will burn 1.2bn more tonnes of coal per year by 2017 compared with today. 
  With the highest carbon emissions, coal makes climate change a lot worse, especially when it is burned in old-fashioned, inefficient power stations. Coal can also produce sulphur emissions – these lead to acid rain – and mercury and soot-particle pollution. 
  Van der Hoeven says that we should make coal more expensive so that people prefer to use cleaner technologies such as renewable power. Providing cheaper gas is the only way to reduce demand for coal. This has happened in the US because of the big increase in the production of shale gas there in the past five years. 
  She said: “The US experience suggests that a more efficient gas market can reduce coal use, carbon dioxide emissions and electricity bills. Europe, China and other regions should take note.” 
  If something isn’t done soon there will be more climate change.