Before you watch the lecture, it is important that you understand 10 key words. For each of the definitions below, choose the correct word.
1. The basic systems and services, such as bridges and power supplies, that a country depends on to work effectively.
2. Being able to continue over a long time and causing little or no damage to the environment.
3. Something which many people believe to be true but is in fact false.
4. Carefully using a resource to protect it from being wasted or damaged so that it can be used over a long period.
5. A long period without rain.
6. Using a device to measure and control how much water is used in a house.
7. Insufficient for the demand.
8. The size of something.
9. When something is the complete opposite of something else.
10. The system of taking dirty water and waste products away from buildings in order to protect people's health.
Congratulations - go on to the next exercise.
You have some incorrect answers. Please try again.
