Judaism - Choosing to be childless

[Dana]

Can Judaism support the practice of choosing childlessness as an option for a young couple for either pragmatic or philosophical reasons?    A grandmother had phoned in to a religious radio station, conservative program, expressing how she did not want grandchildren and did not encourage her children to give her any.  Her reason was mainly because of over population and the environment including other things.  The radio host  seemed offended by her position.   

There are more young people today choosing not to have children and for multiple reasons.