Could you loose bodyfat by just doing cardio and not weights?

yes

of course...you'll lose more muscle though

ORIGINAL: David1991

of course...you'll lose more muscle though

To add on that, if you lose muscle, your body will have a slower metabolism compared.
 
Remember, muscle burns fat.

And to add on to that your muscle determines the shape your body has, so if you have an unpleasantly proportioned physique, after the fat loss it will be nearly the same just smaller. 

ORIGINAL: thehardway

And to add on to that your muscle determines the shape your body has, so if you have an unpleasantly proportioned physique, after the fat loss it will be nearly the same just smaller. 

 
yerp, low muscle and fat just looks manky, tbh i dont see why you wouldnt want to lift weights anyway, theyre a lot of fun, make you healthy and burn calories and make muscle to boot.
 
Having surplus muscle has many many benefits, your body can deal with more taxxing tasks for the most obvious one.
 
If youre worried about "getting too big" then may i take this time to laugh hysterically at you, as it takes years to get to any "nasty" bigness, if you do cardio and weights to a medium degree youll have that muscular athletic look

And to add on to that, "loose bodyfat" sounds like you want more of it

and to add to that it takes more calories for your body to maintain one pound of muscle than it does to maintain 1 pound of fat.  so you will burn more fat with more muscle.  (i don't know if someone already said that)