5:SUSTAINABLE

The number 5 refers to the number of principles in this category and the word SUSTAINABLE refers to the name of this category as the word is common to all 5 principles;

1. SUSTAINABLE WATER - learn more about this principle here.
2. SUSTAINABLE FOOD - learn more about this principle here.
3. SUSTAINABLE ENERGY - learn more about this principle here.
4. SUSTAINABLE TRANSPORT - learn more about this principle here.
5. SUSTAINABLE PRODUCTS - learn more about this principle here.