沥青混合料中拌和废烟头能够改善道路。澳大利亚RMIT大学的研究人员,已经构思出一种新奇的方法,用来减少环境有害废物,同时使城市道路变得更清凉。为什么?烟头似乎是不可以生物降解的,因为烟头的过滤嘴是醋酸纤维素和木头的塑性材料做的。它们使人们吸烟的时候吸入有毒物质,例如:镉、砷、铁和铜。但是一旦被扔掉和进到水里,过滤嘴中的这些金属就会释放到环境里,而其本身不会受到破坏。 Blended waste cigarette butts in asphalt mixes can improve the road. Researchers at RMIT University in Australia have conceived a novel way to reduce environmentally hazardous waste while making urban roads cooler. Why? The cigarette butts seem not to be biodegradable, because the cigarette filters are made of cellulose acetate and wood plastic materials. They inhale toxic substances when people smoke, such as cadmium, arsenic, iron and copper. But once thrown away and into the water, the metal in the filter is released into the environment without itself being destroyed.