environ. |
biogas Gas, rich in methane, which is produced by the fermentation of animal dung, human sewage or crop residues in an air-tight container. It is used as a fuel, to heat stoves, lamps, run small machines and to generate electricity. The residues of biogas production are used as a low-grade organic fertilizer. Biogas fuels do not usually cause any pollution to the atmosphere, and because they come from renewable energy resources they have great potential for future use (气体,富含甲烷,由动物粪便、人类排泄物或者作物残留物在密闭的容器中发酵产生,它被用作的一种燃料,给灶、灯加热,运行小型机器设备以及发电。生产沼气的残留物是用来作为一种低级的有机肥料。沼气燃料通常不会造成任何污染大气,并且因为他们来自可再生能源资源,它们对未来的使用潜力巨大。) |