|Mountain goat, Waterton-Glacier International Peace Park, United States|
Photograph by Philippe Bourseiller
To reduce the need for heating, you can prevent heat from escaping: Insulate the roof, floors and walls with fiberglass wool, rock wool, mineral wool, cork, cellulose (from recycled newspapers) or hemp. This will save 20% on your heating bills and will pay for itself within 5 years at most.
- from the book '365 Ways to Save the Earth', by Philippe Bourseiller