The results released in 013 showed that the total proven natural gas reserves in the world totaled 22 billion cubic meters. Natural gas's contribution to global energy accounts for a quarter, and at the current consumption rate, it can only provide energy for 65 years. To avoid the dilemma that no gas is available, more alternative energy sources must be developed. If any of the following is true, the above conclusion can be refuted most? ? ['In recent years, the contribution of natural gas to global energy is gradually decreasing.', 'With the development of detection technology, the global proven natural gas reserves are much higher than in the past.', 'Due to the application of new technologies, the efficiency of energy use has improved to a certain extent than in the past.', 'Given the design habits of modern machinery, the energy status of natural gas is irreplaceable.']