Runners Matt Hill and Stephanie Tait, who for the past seven months have been traversing an 11,000-mile journey clockwise around North America, stopped at a Jewish day school in Myrtle Beach, S.C., to talk up the environment to 50 students.

The “Run for One Planet” runners told the students from Chabad Academy, a project of Chabad-Lubavitch emissaries Rabbi Doron and Leah Aizenman, that small changes in a person’s behavior – such as consuming less and recycling more – can add up to a world of difference. …