"Soy insulation is the most favorite green insulation method because of its advantages. This is made from natural product 'Soybean' and directly applied to wall or roof in a form of liquid spray foam (chemical free)." ...from this post
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A house is the basic necessity of every human being, because it protects us from all odd atmospheric conditions. That's why it should be well insulated to keeps you cooler during hotter seasons and maintain a good temperature during cold months. A properly insulated house can reduce your electric bill too. Now a days the planet is going under a treat of "green house effect" caused by CO2 emission, keeping this in mind we should choose a better earth-friendly insulation method while constructing a new house or modifying an existing one. In earlier fiberglass batts installed houses were more common and worked well, but they had some toxic effects. Fiberglass batts don't catch fire easily, but when they do, produce more toxic gas substances and can cause itchy skin. So what other green-friendly home insulation options are