"Sustainability" or "to be sustainable" has got something to do with fairness, with equal right and chances, and with treating our planet and each other nicely.
Work in pairs or teams and discuss the following questions:
1. Does everybody you know have enough food, clean drinking water and access to electricity?
2. How can such problems develop and where might they be found?
3. Do you live in a healthy environment?
Put your ideas on paper and share your ideas with your classmates.