Our view is that we have to take account of both population numbers and the level of consumption. It is not really tenable to suggest that families can have more children and by consuming less per person have less of an impact on the environment. There is little if any evidence that future generations will want to consume less, indeed rampant consumerism continues unabated. So yes a society that continues to grow because some think that having extra children is a right will have more of an impact on the environment. Societies that also encourage higher levels of consumption also impose a burden on the environment.
We have to aim for a steady state society – one where the population is static and the economy remains in a state of balance. And we should always ask the question what exactly is the purpose of an ever expanding population?