Listen again and correct the eight errors in this summary of the interview. Natural gas is far less environmentally friendly than other fossil fuels like oil and coal, but it is also being replaced by newer sources of energy, as it will probably run out in 50 years ’ time. The gas sector is unlikely to continue doing well for some time to come, and the opening up of markets, together with deregulation, has created more competition in the industry. Changes in how the sector is regulated mean that gas suppliers can now sell from anywhere. New regulations have also forced some companies to bundle their activities, dividing their companies into separate areas of business. Apart from competition, other factors that have affected the sector include a fall in the use of natural gas, as well as attracting a wider customer base. This has led to mergers between gas and oil companies, as seen in Germany, and the creation of energy giants. Other concerns in the gas sector include security of supply and diversification : the Middle East relies heavily on certain countries and regions for its gas supply, so countries like Spain now import gas from a variety of countries.