In the spirit of the Mercer Island Gets Green community challenge, the Mostly Music in the Park concerts will be matching 100% of the electricity used for the events with renewable energy through Puget Sound Energy's (PSE) Green Power Program for the month of August. Every Thursday in August Islanders are invited to bring friends and family to the Mostly Music concerts in Mercerdale Park in downtown Mercer Island. Representative from PSE's Green Power Program will be on hand to explain how to choose local green energy for your home or business.