Nigeria's Delta region, home of the large oil industry, experiences serious oil spills and other environmental problems. See Environmental issues in the Niger Delta for more details, and Conflict in the Niger Delta about strife which has arisen in connection with those issues. Waste management including sewage treatment, the linked processes of deforestation and soil degradation, and climate change or global warming are the major environmental problems in Nigeria.

Waste management presents problems in a mega city like Lagos and other major Nigerian cities which are linked with economic development, population growth and the inability of municipal councils to manage the resulting rise in industrial and domestic waste.

Haphazard industrial planning, increased urbanization, poverty and lack of competence of the municipal government are seen as the major reasons for high levels of waste pollution in major Nigerian cities. Some of the 'solutions' have been disastrous to the environment, resulting in untreated waste being dumped in places where it can pollute waterways and groundwater.

In terms of global warming, Africans contribute only about one metric ton of carbon dioxide per person per year. It is perceived by many climate change experts that food production and security in the northern sahel region of the country will suffer as semi-arid areas will have more dry periods in the future.

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