What is so “scary” here? It’s literally the
easiest thing you can possibly do. It’s the
default option.
“You know how you were gonna have a second kid? Here’s a thought: consider using the time and money you’d spend on that to do something else. Like retire early.”
If we can’t convince people not to do an expensive, time-consuming, painful thing in order to help stop global warming, we really do have problems.