// environmental credentials Because the books are sold through BookVault, as stated in their plan on their website below, one tree is planted with each book sold. Please see the links below to find out more: https://bookvault.app/printondemand-worldwide-hardwires-a-green-approach-into-print https://printondemand-worldwide.com/about-us/environmental https://ecologi.com/printondemand-worldwide