Skills: Addition & subtraction
Related environmental issues: Water
Area level: household
- Which food requires the largest amount of water to produce?
- How much more does a hamburger requires to produce than 1 serving of beef?
- How much water does it need to produce 1 apple, 1 cup of milk, and 1 egg?
Source: Water Footprint
- 174 gallons (634-460=174)
- 148 gallons (33+63+52=148)