Episcopalians tend to be better-educated and tend to reproduce at lower rates than some other denominations. Roman Catholics and Mormons both have theological reasons for producing lots of children.
Episcopalians aren’t interested in replenishing their ranks by having children?
No. It’s probably the opposite. We encourage people to pay attention to the stewardship of the earth and not use more than their portion.
GR provides the interpretation
Catholic writers, in particular, were rather miffed that the Episcopal leader created such a stark equation that said, in effect: Our numbers are declining because we are smarter and care more about the environment than all of those populist Catholics and Mormons (recall that Jefferts Schori was bishop of the tiny Diocese of Nevada before her election as archbishop).
So now i'll add my interpretation...dumb, anti-environmental believers are known by the size of their families. Yep. Welcome to her church, where they skip the part of the Bible where Jesus says "let the little children come to me," where they frown on those verses that consider children a blessing.