The average house, and its surrounding community, has an impact on the environâ€" ment through solid waste, wasteâ€"water and sewage, use of land, and energy consumpâ€" tion â€" all of which are slowly deteriorating the ecological system we tend to take for granted. Housing that reduces negative effects on the outside environment and on its occuâ€" pants is likely to become increasingly popâ€" ular during the next few vears. "Healthy Housing" is easy on the environment To help protect the environment, the federal housing agency â€" Canada Mortgage and Housing Corporation â€" sponsored a Healthy Housing Design Competition in which innovative housing designs have been recognized. Two winning designs are currently being built, scheduled for compleâ€" tion this summer. Both make maximum use of technology to help minimize the impact on the environment. Toronto architect Martin Liefhebber is creating a selfâ€"sufficient house that will generate its own power, compost sewage, and store rainwater for recycling. The Liefhebber house falls under the category of "infill" housing in which outdoor space is reduced to enable higher density living. For example, a parking garage is replaced by a smaller carport. The overall result is less wasted space and the preservation of wetland and farmland. The house also includes resourceâ€"efficient amenities. A special display on Healthy Housing will be featured at a major international conference on environmentallyâ€"friendly housing called Innovative Housing ‘93, to be held June 21stâ€"25th in Vancouver. For more information about the conference or Healthy Housing, contact Canadian Housing Information Centre, Canada Mortgage and Housing Corporation, 700 Montreal Road, Ottawa, Ont. K1A OP7. Tel: 1â€"613â€"748â€"2367. to TT