toph = earth/metal bender
1) cant she bend the metal in the air, like metal dust, or like metal particles in the air?
2) cant she bend the metal in people's bodies (iron) [if anyone watched XMEN... Magneto used is metal "bending" to kill the gaurd cause huge capacity of iron in his blood]
katara = water bender
1) cant she bend the water in people's bodies?
2) cant she bend the water in the air, not like the clouds, i mean like invisible air, air we're breathing right now
aang = air bender
1) cant he bend the air in people's lungs?
whatchu think?