These would work by co-firing (burning a mixture of) wood and coal.

而这需要通过共燃（燃烧混合的）木材与煤来实现。

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Test results show that the total PAH emitted by burning a multicomponent plastic mixture is lower than the weighted mean, obtained for the individual components.

结果显示，混合塑料燃烧时，多环芳烃排放总量要比单组分燃烧多环芳烃量加权平均后的水平低；

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The mixture may be reignited by other burning material or hot surfaces.

该混合物可能被其它正在燃烧的材料或炎热的表面重新点燃。

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He then looked right at me, his eyes burning with a mixture of tongue-in-cheek danger and mock fear, masking what I can now only imagine as disbelief.

NPR: Marshall Chapman: 'Goodbye, Little Rock and Roller'

The engines increase airflow, creating a more complete burning of the air-fuel mixture--and a more powerful vehicle.

FORBES: Magazine Article

Meanwhile, other completely different approaches involve burning coal in pure oxygen (oxyfuel), or turning it into a mixture of carbon monoxide and hydrogen, which is then burned.

BBC: Whatever happened to carbon capture?