The Rule of Threes | How Long Will You Survive?

From the Civil Aviation Authority of New Zealand :

"How long will you survive without: Air – 3 minutes (drowning, carbon monoxide inhalation or major trauma)
Clothing and Shelter – 3 hours (in extreme cold, due to hypothermia)
Rest – 30 hours (depending on level of exertion)
Water – 3 days (depending on temperature and activity level)
Food – 3 weeks (unless you’re burning calories flat out trying to keep warm)"