Of all the houses I have visited, hers was always the cleanest.
Since kennel cough is transmitted via the air, it can be found in even the cleanest kennels and can be contracted by even the most pampered and pedigreed pooch.
Solar panels produce absolutely no pollution, making them the cleanest source of alternative energy.
It is the cleanest option and doesn't introduce any unnecessary chemicals into the home.
The Environmental Protection Agency has gone on record to call geothermal energy the cleanest and most cost effective form of air conditioning system available to consumers.
