This is a summary. To read the whole story subscribe to BostonGlobe.com
At the Mass. Recycle-sponsored R3 Conference (R3 stands for “reduce, reuse, recycle”) Tuesday in Marlborough, Gloucester Mayor Carolyn Kirk presented a case study on the success the city has had with its pay-as-you-throw trash program since switching from stickers to bags five years ago. Since residents began using the more easily measured bags for throwing trash out, the city has saved more than $1 million and increased the residential recycling rate from 23 percent to 31 percent. The new system was projected to cut solid waste volume by 15 percent, but instead it cut volume by 29 percent, according to city figures.