The Doctor nodded at the vast field of green before them. "It happened not long past your time. Some idiot thought it would save money to introduce genetically modified grass that was resistant to pesticides, it cross-pollinated to other plant species and a super weed smothered the park."
"So they replaced everything with fakes?"
Jack snorted derisively. "I don't know what they were thinking. Artificial grass is a nightmare for friction burns."
dw100 — challenge #108: plant