Petroleum is a non-renewable resource, and many oil fields are now getting depleted because of massive demand by consumers and industries that use fossil fuel products.
石油是一种非再生性资源，由于消费者和使用矿物燃料产品的工业的大量需求，许多油田即将枯竭。
2
Biodiesel is made from processed vegetable or plant oil, and can be used in diesel engines on its own, or blended with petroleum-based fuel.
生物柴油是以菜油或是植物油加工而成的燃油。可以单独用于柴油机，也可以和以石油为基础的燃油混合使用。
3
The growing premium for fueloil, a petroleum product similar to diesel, is helping accelerate what's been a steady decline in its market share of U.S. homes and businesses.