text: Christianity is the fastest decling religion.  U are right, EUrope's population is declining because every woman is giving birth to 1.3 kids in average.  And there population is decreasing.  \n\nSecondly, Christians are converting into Atheism, Agnostic, and Islam.  If population is the main cause for the decline of Christianity in Europe, then Islam and Athiesm is the cause for its decline in North America.\n\nCanada for example was 90% Christian, and now recent study say that 60-70% are Christians.  In Toronto there is a mosque in which christians convert to Islam daily.