Yet there is literally no documentation that duct cleaning improves indoor air quality. Duct cleaning may make sense if the air-handling system is visibly dirty and if the duct cleaners you hire are conscientious professionals, not just someone with a pickup truck and a shop vac. In terms of health hazards, all fiberglass is alike. Solar cells will never be cost effective. Don't bet on it.
Log homes are too leaky to provide good energy efficiency.
When properly built, log homes are fairly airtight. Polyethylene vapor retarders are a must. Low-perm paint should be good enough to resist moisture diffusion through walls and ceilings. EFM is a non-profit federation which supports 20 of Michigan's leading environmental organizations, including Urban Options, through employee payroll deduction programs. More than 20 radio and TV stations and newspapers aired coverage during a three-day period.