What Causes Excessive Flatulence?

hi , I have been having Gas problem(Smelly Farting), since 4-5 years. Now I am having problem of very Sticky & smelly stool, although the color is normal, since past 7 days. No pain or any other symptoms. Now I ve relocated & my diet too has changed. Breakfast:(Cereal with Cold Milk & Omelette with One Brown bread Toast) Lunch: (Little Rice, any Indian Vegetable(Sabzi),Cereal(Daal), Longlife Yogurt, Tomato Juice, fresh Green Salad(Cucumber, Carrots, Onion, etc)), Dinner: ( Indian Chappati(Wheat), any Indian Vegetable(Sabzi),Cereal(Daal), Longlife Yogurt, Tomato Juice, fresh Green Salad(Cucumber, Carrots, Onion, etc)) Kindly Advise , what could be wrong. Raj