Just how pervasive are plastics in our lives? Try and live just a week without any. That’s the notion behind the Ypsi Plastic Free July Challenge. It is put forth by Zerowaste.org and runs through August 1st. WEMU's David Fair spoke with Zerowaste.org co-founder and deputy director, Lydia McMullen-Laird, about this year’s challenge and some tips on how best to reduce the use of plastics in our homes.