There are many decaffeinating processes, some using chemicals solvents, some gasses, and some only steam or water. The method that involves chemical solvents, methylene chloride in this case, is still under debate as to it's safety. Methylene chloride has been found to cause depression of the Central Nervous System and other ill effects. Companies that use this process debate that the methylene chloride burns off during the roasting process.
Pooki's Mahi's coffee suppliers prefer to use an all natural water based process that uses no methylene chloride.