Concrete Jungle to Concrete Sow Farm

It's because of McDonald's. They're taking up all the green space with their drive-throughs and spray painting "Eat 3 Big Macs" on all the park benches. Link. Excerpt:

People who live in city areas with little green space, lots of graffiti and litter are more likely to be obese, compared with people living in city areas with lots of greenery, the researchers claim in a new report.

"People who live in more pleasant and attractive environments, which in our study was assessed by levels of greenery, are much more likely to be physically active and not to be overweight or obese," said study author Anne Ellaway, a senior science officer in the Medical Research Council's Social and Public Health Sciences Unit at the University of Glasgow, Scotland.

"Conversely, in less attractive areas, those with lots of graffiti, litter and dog mess, people are more likely to be overweight or obese and to take less exercise," she added.