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In cold weather a simple thick scarf over face and nose is effective and reducing exhaled water by between a quarter and a half. On inhaling, the scarf is chilled. On exhaling, some of your breat...
Answer
In cold weather a simple thick scarf over face and nose is effective and reducing exhaled water by between a quarter and a half. On inhaling, the scarf is chilled. On exhaling, some of your breat...