disposal of ash and slag

例句：

1. 1. The company has to dispose ofthe toxic waste properly.
   公司必须妥善处理有毒废物。
2. 2. The government is considering new methodsfor waste disposal.
   政府正在考虑新的废物处理方法。
3. 3. The factory needs to dispose of itshazardous waste safely.
   工厂需要安全地处理其危险废物。