some leafy greens are negative calories?

[nclifter6feet6]

i heard somethin like this. i hear lets say raw cabbage or steamed cabbage for instance. ......your body would expend more calories to digesting cabbage then the amount of cals in cabbage right? this seems possible. also a gallon of cold water takes 100 calories to bring up to normal temp right?

 

[anthrax]

same thing for celery, lettuce and other salads