DAMARISCOTTA — Bob Hardina, former owner of Mid-Coast Energy, will give a candid discussion about the differences between classic and new or alternative technologies for heating and cooling ones home and how to determine which one fits the needs of your home and lifestyle at 10 a.m. Tuesday, Aug. 23, at Spectrum Generations coastal Community Center, 521 Main St. Participation fee is $5. To register for the workshop, call 563-1363.