Governments should spend part of the fuel tax on cycle lanes and cheaper means of transport. All cities are divided between rich and poor sectors. Business growth and rising numbers of tourists increase the incomes of the rich but the poor see little of the increased wealth. Vast numbers live in shanty towns in cheap, self-made sheds. There is insufficient clean water or sanitation, few schools, few amenities of any kind.
Health suffers first.
It is estimated that 100 million people in cities are homeless in both developed and developing countries. Some of the worst polluting industries are likely to be located in poor or racially distinct neighbourhood. Water is the single most valuable resource for cities. Many cities are facing a serious shortage of safe drinking water as a result of leaking pipes and pollution from POPs. Most city people in developing countries end up boiling their water, or buying bottles.