What is the reason behind the Iranian authorities' promotion of larger families?

One of the most significant consequences is the strain it puts on natural resources. As the population grows, so does the demand for food, water, and energy. This leads to deforestation, pollution, and the depletion of non-renewable resources, which can have serious long-term impacts on the environment. Overpopulation also contributes to a number of social problems, including poverty, unemployment, and overcrowding. In many developing countries, the rapid population growth has outpaced economic development, leading to widespread poverty and social inequality.