Until recently, the world's energy demands were met almost entirely through the use of fossil fuels: wood, coal, petroleum, and natural gas.

不久之前还几乎全靠木头，煤炭，石油，天然气等化石燃料来满足全人类对能量的需求。

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To effective guarantee the quality of wood drying, reduce energy use and lessen costs, these advantages have important guiding significance of theoretical and practical research.

这对提高木材干燥过程的控制水平，有效地保证木材干燥质量、降低能源消耗和减少成本，具有重要的理论研究和实际指导意义。

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We use this energy when we burn wood of fossil fuels or when we consume the plants as a source of food.

我们使用这种能量，当我们燃烧化石燃料的消耗木材或当我们作为食物来源的植物。

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The U.N. talks, for instance, are held in the LEED-certified Qatar National Convention Center, which is built with sustainably harvested wood, uses skylights and LEDs to curb energy use, and supplies 12.5 percent of its own energy with 11, 000 feet of solar panels.

FORBES: Qatar: An Odd Place For Climate Talks?