"You must be 21 to drink" is a phrase that makes it easy to remember how to purify water.Two Drops of Bleach per One Liter of Water. Wait 30 minutes. (Note: 2 + 1 = 3, which is part of the memory trick here.)
"You must be 21 to drink" is a phrase that makes it easy to remember how to purify water.Two Drops of Bleach per One Liter of Water. Wait 30 minutes. (Note: 2 + 1 = 3, which is part of the memory trick here.)
