Similarly , hairshirt environmentalism refers to the belief that denial of material comfort will lead to environmental sustainability .
A hairshirt ( or Cilice ) is an undergarment worn to induce discomfort , and thereby lead the wearer to spiritual purity , salvation , or atonement for sin .
Hairshirt environmentalism refers to the belief that denial of material comfort will lead to environmental sustainability .
A hairshirt ( or Cilice ) is an undergarment worn to induce discomfort , and thereby lead the wearer to spiritual purity , salvation , or atonement for sin .