Exxon Mobil reports that by 2030, natural gas will become the world’s second leading fuel, displacing coal in the number two slot and second only to oil. The prediction is one of many contained in the company’s annual survey titled Outlook for Energy, which was released on Thursday.

Natural gas will be the fastest-growing major fuel. By 2030, demand for natural gas will be more than 55 percent higher than in 2005. Technologies that have unlocked “unconventional” gas will help satisfy this demand.

The Exxon Mobil report cites cites numerous benefits associated with this abundant fuel, including significant environmental ones:

Natural gas will meet a growing share of our energy needs through 2030. Given its abundance and properties as a clean-burning fuel, expanded use of natural gas in power generation can serve economic progress and help advance environmental goals as well.

The report also points out that giant gains will be made by nuclear power and renewable energies.

But the most important new fuel source, according to the report, is not actually an energy. It is an attitude that focuses on increasing energy efficiency at home and in the workplace.

One of the most important “fuels” of all is energy efficiency.The energy saved by improved efficiency through 2030 is larger than from any other single source, including oil

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