This is where society sometimes gets it wrong: assuming that simply cutting the number of children will fix the problem. The “issues” Pope Francis lays out in Laudato Si’ should make us all squirm. Our entire culture is built on convenience (which is to say, disposability) and consumption–the more, the better.
In my neighborhood every week, the amount of trash and recycling that goes out in households with 2-3 people is often three to four times larger than what we, as a family of 6, put out. Sustainable living is a value that parents have to prioritize in our own lives and intentionally pass on to our children–just like respect for life and the centrality of the Eucharist. Two kids raised in an atmosphere that is cavalier or thoughtless about consumption will do as much or more damage to God’s creation as six kids raised with a heart of environmental stewardship.