Which of the following is an example of how green roofs help save costs?
1. Green roofs protect and maintain biodiversity 2. Green roofs improve air quality 3. Green roofs are a place for relaxation 4. Green roofs act as natural insulation.
How do both jetties and seawalls help manage beach erosion?
1. Both use plants to help keep sand on the beach 2. Both are hard structures that reduce erosion caused by waves
3. Both provide flood protection in the event of high waves 4. Both bring sand to the beach from offshore.