❝Conservation of Life is the newer and broader Public Health—it embraces all the Science of Hygiene. It seeks to minimize and prevent as far as possible disease, disability and waste in human life by the betterment of man’s environment and occupation, assuring to all classes of the community those amenities which in their widest sense will produce the highest attainable degree of human efficiency. It is the centre around which gather and by which all our natural resources are vitalized and without which there can be no truly national vitality.
— Commission of Conservation, Canada, 1916