All of the following statements are true except 1.recycling petroleum-based products conserves resources 2.air quality is important everywhere, not just in large cities 3.human activity is limited by the availability of resources 4.alternative energy sources are often too impractical to use

The only one that is not true is (1.)Recycling petroleum-based products conserves resources.

d. stage 4

explanation:

the existence of some kind of demographic transition is widely accepted in the social sciences because of the well-established historical correlation linking dropping fertility to social and economic development.[1] scholars debate whether industrialization and higher incomes lead to lower population, or whether lower populations lead to industrialization and higher incomes. scholars also debate to what extent various proposed and sometimes inter-related factors such as higher per capita income,lower mortality, old-age security, and rise of demand for human capital are involved.[2]