The typhoon was created by GOD.....the humans make it worst....because humans are careless to mother earth,and they live everywhere in this world..
but other says its because of the Human Factors who make the typhoon gets stronger but the reality is that in the part of the Asia one of the countries are to be blamed or all over the world cause some countries are using power of nature to make revenge to other country so that force goes to Philippines and that makes as the typhoon Haian but there is no possibility that, that is true no Research for that first :)