Wiktionary
carbon market
n. Any market in which carbon emissions trading takes place
Wikipedia
Carbon Market
The Carbon Market is the oldest and largest farmer's market in Cebu City, located in the Central Visayas region of the Philippines, and is a major tourist attraction. It is wheelchair accessible. It is located in downtown Cebu City, on MC Briones Street, Ermita barangay, and it can be reached by most buses or jeepneys in that area. Wares sold include clothing and kalamansi, baskets from Bohol, fish, chickens, and tripe, as well as souvenirs and handicrafts.
Although there is significant crime in the downtown area around the Carbon Market, the crimes are controlled by police, the vendors, and nearby residents.