Give an example
Tokyo, (34,300,000) Mumbai, (23,000,000) Mexico City, (22,900,000) Manila, (20,300,000) Los Angeles, (18,100,000) London, (12,500,000) Paris, (10,200,000) Rio de Janeiro (12,500,000)
Environmental issues
Air pollution. Noise pollution. Urban sprawl. Increasing sewage. Increasing rubbish and waste. Lack of open space.
Economical issues
Unemployment.
Increasing cost of housing and land.
Rising demand for public servers (e.g. health and education).
Rising demand for clean water.
Preserving historical and cultural sites.
Social issues
Tensions between existing residents and new arrivals.
Increasing crime and anti-social behaviour.
Traffic congestion.
Overcrowded public transport.