Paragraph Six A good solution to the waste and energy problems would be one which solves them both, according to modern scientists. The possible solution would be to generate energy from wastes. Municipalities with large waste-disposal problems are likely to be attracted to incinerators that convert combustion heat to usable energy. 41 .I______use of waste for energy production.
【正确答案】：Introduction
【题目解析】：该段主要讨论了垃圾与能源问题之间的处理问题，介绍了从垃圾中产生能源的解决方法，可以概括为“介绍使用垃圾生产能源”，空白处缺少“介绍”一词，introduction符合题意。
