The fall is the best time to begin your compost pile, so on September 15 West Roxbury Saves Energy will repeat this popular program for those who missed it in July. West Roxbury resident and composting expert Lisa Becker will take you through all you need to know about home composting, including information about the different kinds of bins, trouble-shooting, and tips for success. The program ends with a Q&A. Free and open to all. For more details visit westroxburysavesenergy.org.