But for now, there are no new rules on power plant waste.

但是现在，并没有新的法规用来限制发电厂的排放。

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Since he mixed with plant waste water irrigation, the trees would have died.

自从他用混合着加工厂废水的水源浇灌后，树木就都死了。

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Converting this plant waste into fuels is an important goal for the biofuel industry, which currently USES food crops such as corn.

将该种菌加入植物废料并将其转变成燃料，将成为生物燃料工程的一大目标。目前的生物燃料以农作物例如玉米为主。

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Tilling can remove weeds and the waste from last season's crops and help break down old plant material into fertilizer.

VOA: special.2010.09.28

Much-touted cellulosic ethanol from plant waste remains a long way from commercial production reality.

FORBES: Renewable Energy Delusions: Getting A Real Grip On Alternatives

The process works at 90 percent efficiency, and it can be used on a variety of plant waste beyond orange peels.

FORBES: Orange Peels Could Be Made Into Biodegradable Plastic

It is also developing an anaerobic digester that acts like a giant cow stomach, creating biogas from solid food and plant waste.

FORBES: Technology