It's almost decision time for a proposed one-billion-dollar natural gas power plant in Burrillville. The Rhode Island Energy Facility Siting Board listened to opening statements from town representatives, conservation lobbyists and Invenergy on Thursday. The town and the Conservation Law Foundation say the plant is unnecessary and would have a negative environmental impact, but Invenergy officials say the plant is needed to fulfill local energy demands. The next meeting is scheduled in July.