In the article, Chicago is described as being “…at the forefront of the green-roof movement” with other cities moving quickly to catch up. How do the following sentences conflict with this point of view?

“Those 500 green roofs represent a little less than one-tenth of 1 percent of Chicago’s…buildings. By comparison, experts in Germany said that in 2010, 15-20 percent of the flat roofs in that country were green.”

How do these sentences compare to the overall tone of the articles? How does it impact the mood?

this from the article Rooftop views are growing greener as crops sprout up high