Which of the following is FALSE about Green Roofs, as seen in this picture?

Green Roofs: A Sustainable Solution for Urban Development | by Robert C. Brears | Mark and Focus | Medium

a
The purpose of a green roof is to increase our land area for farmland.
b
A green roof consumes CO2 from the air and reduces greenhouse gases.
c
A green roof is an example of an Urban Green Space.
d
A green roof moderates temperatures and provides habitats for wildlife.

a. The purpose of a green roof is to increase our land area for farmland.