Insulation can be an important element in green building by cutting down on a building's energy usage. There's a diverse range of insulation options available in today's market, each with advantages and drawbacks. One should consider how much energy saving an insulation can provide per cubic inch, what materials the make up the insulation, and how the insulation may contribute to indoor air quality.
One type of insulation that TreeHugger has been examining for years is plastic foam. Margaret Badore has written a five-part investigative series on the safety of sprayed polyurethane foam insulation. This series examines the potential health hazards associated with of spray foam insulation, its chemical makeup, its fire safety, and explores other insulation alternatives.