Across
- 2. The point in time when the maximum rate of extraction of petroleum is reached (8 letters)
- 3. Development that meets the needs of the present without compromising the ability of future generations to meet their own needs (21 letters)
- 5. A resource that is not replenishable within a human lifespan (13 letters)
- 6. Organic material that comes from plants and animals (7 letters)
Down
- 1. Resources that can be replenished naturally (19 letters)
- 4. Footprint The measure of human demand on Earth's ecosystems (18 letters)
- 7. Energy harnessed from the sun (10 letters)