Nigeria has 5,000 registered industries. However Nigeria also has about 10,000 illegal industries. Kano, Kahuna and Lagos have had many pollutants going directly into open drains and water channels. These pollutants are harmful to people and damage ecosystems. Some industries dispose of chemical waste on the surrounding land, harming groundwater quality. Industries also producing many harmful gasses. 70-80% of Nigeria's forest have been destroyed, (logging, roads, Urban expansion, e.t.c). Nigeria is also having issues with desertification.