Another great (and cost-effective) way to go green around your home is to simply wipe your feet!
Make sure to equip your exterior doors with doormats so that everyone enters your home with clean shoes. As long as there's room for approximately five steps on the doormats, you'll drastically reduce the amount of bacteria being tracked in.
Reduced bacteria means fewer disease-causing pathogens and less chemical cleanup. It also means improved indoor air quality, since dirt embedded in carpet can easily become airborne.