Be S.M.A.R.T. about your goal setting. All exercise is good for something, but no single exercise is good for everything. Do the things that will get the result you are striving to achieve. Losing centimetres - combine a smarter diet with cardiovascular and weight training. Losing weight - focus or aerobic exercise and your diet.
Food is very important when trying to lose weight.
For example, walking or running 1.6 kilometres burns roughly 250kJ. You need to burn 6500kJ to lose a kilo of fat. That is 26km per kilogram. That is a lot of running so eat properly. Building strength - get in the weights room. Hit the weights hard and do not worry too much about aerobic exercise.