An ECOLONY Guided Tour Each sheltering about 100 people, ecolonies have wellsoundproofed private spaces for those living alone or as couples, in nuclear families, or neofamily groups. There are common areas for child care, medical care, parties, meetings, dances, lounges, food production and processing, arts and learning, theatre, worship and meditation, and cottage industry. The solar co-op below is 400 feet long. It is three stories tall, with attached greenhouses at every level. Half undergrounded in a 3-degree slope, it lays on a NE-SW axis. Surrounding earth moderates temperatures-- cooling by spring and heating by end of summer. It is fireproof and waterproof. Ecolonies are surrounded by orchards and gardens. Philadelphia will need thousands such dwelllings to enjoy winters without fossil fuel, and to merge with urban agriculture.