矿区每年有大量的废热排出，把其废热利用起来会有很大的节能效果。
A large number of mining waste heat discharged in each year, the use of its heat will save energy.
发生炉煤气废热利用是煤气分厂加强能源综合开发利用的一项重要工作。
Producer gas heat-recovering is an important work of strengthening comprehensive development and utilization of resources in Gas Branch Factory.
1993年时，该市开始利用和燃烧当地的废木料，到了1999年，开始依靠新型沼气厂生成的热来供暖。
By 1993, it was taking in and burning local wood wastes, and in 1999, it began relying on heat generated from the new biogas plant.
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