Coal and natural gas are mainly used for electricity generation, whereas oil is used mostly to power transportation, yet the prices of all these energy sources are linked.

煤炭和天然气主要用于发电，而石油主要用于给运输提供能量，但所有这些能源的价格是相互关联的。

youdao

Renewables account for only a small share of global primary energy consumption, which is still dominated by fossil fuels—30% each for coal and oil, 25% for natural gas.

可再生能源只占全球主要能源消耗的一小部分，化石能源仍然占主导地位——煤炭和石油各占30%，天然气占25%。

youdao

Well, there were other energy choices like oil and natural gas, right?

因为还有类似石油和天然气这种其他的资源可供选择，对吗？

youdao

Natural gas provides Americans with about one-fourth of their energy.

VOA: special.2009.10.23

It is not clear what it will be able to do to help revive energy talks with Uzbekistan, Kazakhstan and Turkmenistan, During negotiations in the Czech capital,Prague, the three natural-gas producing nations were not convinced by E.U.offers of more trade and stronger transport links in exchange for their participation in a multi-billion-dollar gas pipeline, known as Nabucco.

VOA: standard.2009.05.11

It has become even more crucial as a potential transit route for Europe-bound natural gas from energy-rich Azerbaijan and Central Asia, as well as from Iraq (and eventually Iran).

ECONOMIST: Turkish foreign policy

Many of those contracts promise to supply electricity below the cost of energy produced by natural-gas fired power plants.

FORBES: California Reveals Price It Pays For Renewable Energy

Unlike traditional "centralized" systems, distributed energy relies on small power-generating technologies like solar panels or ultra-efficient natural-gas turbines built near the point of energy consumption to supplement or displace grid-distributed electricity.

FORBES: The Answer To The Energy Problem