Recently protein feeds for animals have been developed by growing yeast in a petroleum based stock.

最近已经研制出一种动物食用的蛋白质饲料，它是用石油作为基本原料加上酵母而制成的。

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Diesel will cost more, but petroleum-based diesel sells in America for 57 cents a litre before distribution costs and tax, so there should be room for profit.

柴油的价格会更高，但石油基柴油在美国的销售价格为每升57美分，不含分销成本和税金，因此应该有获利空间。

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America has abundant natural gas reserves, and he wants natural gas to replace petroleum-based vehicle fuels.

美国具有丰富的天然气藏量，他计划用天然气来取代基于石油的车辆燃料。

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He points out that traditional flowerpots made from petroleum-based plastics can last much longer.

VOA: special.2010.06.01

Eleven workers are missing. British Petroleum leased the rig, owned by Switzerland-based Transocean.

VOA: special.2010.05.01

(Obama's Speech) In crafting the U.S.response to global climate change, the president said congressional lawmakers must take into account the real price of America's heavy reliance on petroleum-based energy.

VOA: standard.2010.06.14

As plastic is a petroleum based product these small particles act as persistent organic polluters, which means that they form a sponge attracting toxins such as insecticides and pesticides.

CNN: STORY HIGHLIGHTS

For driving, no fuel is yet greener in the proper sense of using fewer overall resources than petroleum based gasoline, and we can acknowledge that an electric car is actually coal-powered.

FORBES: Alternatives To Obama's Fiscal Cliff Proposal For An Infrastructure Bank

In fact there is growing evidence that biofuels may actually release more CO2 emissions than conventional petroleum-based petroleum does.

FORBES: Biofuels: Fields Of Pipedreams