今年三月,美国三里岛核电站发生了放射性物质逸出的严重事故后,人们纷纷指责原子核能是一种“危险的能源”。那么,能否找到其它不危险的能源呢?人们不约而同地想到了尚够开采几百年的煤。但是,专家们早已提醒人们,煤也远远不能算是一种“安全的能源”,尤其是现代的煤电站,为了充分地提取煤中所含的能量,先将煤块粉碎成极细的粉末,然后进行燃烧。这种煤粉在燃烧时会产生大量微细的飞灰,即便使用最好的污染过滤装置也无法捕获它们,人们的鼻腔、喉咙里的“过滤装置”就更无法挡 In March of this year, after a serious accident involving the escape of radioactive material from the Sanri Island nuclear power plant in the United States, people accused nuclear power as a “dangerous energy source”. So, can we find other non-hazardous energy sources? People invariably think of coal that is still enough for exploitation for hundreds of years. However, experts have already reminded people that coal is far from being a “safe energy source”, especially for modern coal power plants. In order to fully extract the energy contained in coal, the coal is first crushed into tiny pieces. The powder is then burned. This type of pulverized coal produces a large amount of fine fly ash when it is burned. Even if the best contaminated filter device cannot be used to capture them, the “filtering device” in people’s nasal cavity and throat is even more unstoppable.